Page 1 SSU-2000 Synchronization Supply Unit and the SDU-2000 Synchronization Distribution Unit User Guide Revision F.01 – January 2007 Part Number 12713020-002-2...
Page 2 2300 Orchard Parkway San Jose, CA 95131-1017 U.S.A. http://www.symmetricom.com Copyright © 1999–2007 Symmetricom, Inc. All rights reserved. Printed in U.S.A. All product names, service marks, trademarks, and registered trademarks used in this document are the property of their respective owners.
Page 3: Table Of Contents
SSU-2000 Main Shelf (Chassis) ........
Page 4 Rack Mounting the SSU-2000 ........
Page 5 SSU-2000 Status LED Indicators ........90...
Page 6 Responding to SSU-2000 Alarms ........
Page 7 Input Wire-Wrap Adapters........200 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User Guide...
Page 8 Alarms and Events ..........258 SSU-2000 User Guide...
Page 9 SSU-2000 Configuration Chart ........
Page 10 Table of Contents SSU-2000 User Guide 12713020-002-2 Revision F.01 – January 2007...
Page 11 SSU-2000 Configured as a TSG ........
Page 12 SDU-2000 Recommended Slots for DS1 LRM Installation ....252 8-26 Installing the Cut-Through Assembly in the SSU-2000 ....253 8-27 Installing the Cut-Through Assembly in the SDU-2000 .
Page 13 Time Sync Generator (TSG) System Configuration ..... . 270 SSU-2000 Configured as PRS System ....... 271 SSU-2000 Configured as Monitor-Only System.
Page 14 Table of Contents SSU-2000 User Guide 12713020-002-2 Revision F – October 2006...
Page 15 SSU-2000 Readiness Checklist ........
Page 16 SSU-2000 System Components ........279...
Page 17: How To Use This Guide
Structure of This Guide Conventions Used in This Guide Warnings, Cautions, Recommendations, and Notes Related Documents and Information Where to Find Answers to Product and Document Questions What’s New in This Document 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide...
Page 18: Purpose Of This Guide
Symmetricom SSU-2000 Synchronization Supply Unit. An accompanying document, the SSU-2000 Technical Reference (12713020-003-2) describes default alarms and events, the languages you use to communicate with the SSU-2000, default values, and other information. Who Should Read This Guide Chapter 1, Product Overview, is written for non-technical audiences who need general information about the product.
Page 19: Structure Of This Guide
Describes the Output modules available for use in the Reference Data SSU-2000 and the SDU-2000. Chapter 9, Hardware Describes how to configure the SSU-2000 in several modes, Configuration Guide and lists part numbers for shelves, modules, and accessories. Index Provides references to individual topics within this guide.
Page 20: Warnings, Cautions, Recommendations, And Notes
How to Use This Guide When text appears ... it means: this way... SSU-2000 User’s Guide The title of a document. An operating mode, alarm state, status, or chassis label. CRITICAL Select File, Open... Click the Open option on the File menu.
Page 21: Related Documents And Information
Related Documents and Information Other helpful documents and software tools are listed below. See your Symmetricom representative or sales office for a complete list of available documentation. SSU-2000 Technical Reference (12713020-003-2) SynCraft management software...
Page 22: Where To Find Answers To Product And Document Questions
Where to Find Answers to Product and Document Questions For additional information about the products described in this guide, please contact your Symmetricom representative or your local sales office. You can also contact us on the web at www.symmetricom.com. What’s New in This Document Revision F.01 of this guide contains the following new information:...
Page 23: Chapter 1 Product Overview
Chapter 1 Product Overview This chapter describes the SSU-2000, and provides a theory of operation for the unit. The SDU-2000 expansion shelf is introduced and described. In This Chapter Overview Typical System Configurations System Architecture System Components Communications Protocol Overview of SSU-2000 Operation...
Page 24: Overview
The SSU-2000 conforms to specifications for International, European and North American applications as a Primary Reference Source (PRS), and Synchronization Supply Unit (SSU), and Timing Signal Generator (TSG). The SSU-2000 allows for the integration of a variety of synchronization reference schemes including GPS and land line DS1/E1.
Page 25: Typical System Configurations
IGNORE, REPORT, ALARM, or FAIL. Typical System Configurations The modular design of the SSU-2000 permits a great deal of flexibility in configuring the system components for a variety of applications. Three of the more common configurations include:...
Page 26: Primary Reference Source (Prs) Configuration
The remaining input signals are then compared to the phase-locked oscillators (and indirectly to the designated input reference). The SSU-2000 continuously monitors the integrity of the incoming timing signal. The operator defines input acceptance criteria and sets parameters for alarming.
Page 27: System Architecture
SSU-2000 shelf to meet a variety of telecommunications synchronization application requirements. Modules can be inserted or removed from the SSU-2000 while the shelf is operational without any degradation of output signals. Each module supports the management of critical, major, and minor alarms.
Page 28: Input Section
Wander is reported in terms of Maximum Time Interval Error (MTIE) and Time Deviation (TDEV). The data is then stored for use in the SSU-2000 and reported through the Communications module. You can install one or two GPS Input modules that use the satellite-based Global Positioning System signals as a synchronization reference.The Input signal types...
Page 29 Chapter 1 Product Overview System Architecture You can provision the SSU-2000 to automatically select the highest-quality input signal, or you can manually select the input signal you want to use. Two factors determine the quality of the input: the user-defined Priority level, and the PQL/ SSM.
Page 30 Priority setting; if all inputs have the same Priority level, then the input with the highest PQL (quality level, SSM) is used. If you select PQL mode, the SSU-2000 selects the input reference with the highest assigned PQL level or associated SSM; if all inputs have the same PQL/SSM value, then the input with the highest Priority levels is used.
Page 31: Output Section
(one that is free from input faults while meeting acceptable frequency and MTIE specifications). The SSU-2000 controls clock frequency by adjusting the control value of the Direct Digital Synthesis (DDS) function in each Clock module. The adjustments are processor-controlled and based on measurements performed and computed in the Input module(s).
Page 32: Alarms And Events
The Communications module provides an interface between the user and the SSU-2000 system. This interface allows the user to display and control much of the activity in the SSU-2000 system and within the optional SDU-2000 expansion system.
Page 33 The REPORT mode option is used to report alarm indications only. An ALARM command is available in the SSU-2000 that allows a user to view the current status of alarm indications on the unit and set alarm delay intervals and activation levels.
Page 34: System Components
LEDs on the front panel of modules. Fail Mode In the FAIL mode, the SSU-2000 removes the failed module from service or usability to prevent interruption of the system. For example, a FAIL event detected in Clock A causes a switchover from Clock A to Clock B, effectively removing Clock A from the system.
Page 35: Components In A Typical Ssu-2000 Installation
Chapter 1 Product Overview System Components Figure 1-6. Components in a Typical SSU-2000 Installation 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide...
Page 36: Slot Numbering Assignments
System Components Module Assignments All SSU-2000 modules are equipped with card ejectors and plug in from the front of the shelf. Each module is secured in the shelf with captive fasteners.The module assignments for the SSU-2000 main shelf are listed in...
Page 37: Rear Panel Of The Ssu-2000 Main Shelf
(Clock B). Main Shelf Connections The rear panel of the main shelf contains the connection terminal strips, BNC connectors, and SCSI-II connectors that are used to connect the SSU-2000 to other system components. These connection features are described in Figure 1-8.
Page 38 The main shelf accepts redundant –48 VDC power inputs from external supplies and makes these inputs available to the modules via the motherboard connectors anytime the 5-Amp fuses are installed on the rear of the SSU-2000 main shelf. An On/Off switch is not provided, preventing anyone from accidently shutting down the system.
Page 39: Location Of Power Fuses On The Rear Panel
Location of Power Fuses on the Rear Panel Antenna Connectors The SSU-2000 contains two TNC connectors to allow for connection of a radio antenna. Connector J6 is wired into I/O slot A3 and connector J7 is wired into I/0 slot A5 (the only slots that can be used for installing a Radio input module). A variety of GPS antennas are available as accessories, see the SSU-2000 Technical Reference.
Page 40: Ssu-2000 Family Of Modules
A user interface (software residing in the Communications module) provides various levels of password-protected access for configuration, detailed performance monitoring, and diagnostics. Refer to the SSU-2000 Technical Reference for more information on configuration and detailed performance monitoring. Remote EIA-232-C ports can be assigned their own interface type, either Interactive Command Set (ICS) or TL1 that is retained in NVRAM.
Page 41: Clock And Communications Modules
All SSU-2000 modules (except the Buffer module) have an integrated CPU with firmware and are software configurable. Each module slot also has three pins connected together on its assigned Hybrid DIN connector which permits the system to detect when a particular module is removed.
Page 42: Input Modules
The DS1 and E1 Input modules are available with both 1-Port and 3-Port configurations. These modules receive signals and perform phase measurement comparisons with the Clock modules that are installed in the SSU-2000. The Clock modules use this information to phase and frequency lock to the incoming signal.
Page 43 Modules, on page 170. GPS Input Module The GPS Input module is a one-port card that can only be installed in the SSU-2000 main shelf. The module is used to correct the frequency of the oscillator on the Clock module. It monitors and reports the status and performance of the module and radio signals that it receives.
Page 44: Output Modules
Output Modules E1 Output Module The E1 Output module uses one of three 4 kHz clocks from the SSU-2000 main shelf backplane to generate a phase-locked signal of 2.048 MHz. If the unit is inserted into an SDU-2000 expansion shelf, a fourth 4 kHz clock (D clock) is available. The phase- locked 2.048 MHz signal is used to generate a set of 20 output signals for distribution...
Page 45 Module, on page 219 for more information. Japanese Sine Wave Output Module The J/SW Output module uses one of three 4 kHz clocks from the SSU-2000 main chassis backplane to generate a phase-locked reference signal for the synchronized clock output signals. The phase-locked signal is used to generate 20 software selectable outputs of either 6.312 MHz or 1.544 MHz for distribution to...
Page 46: Configuring Redundant Output Modules
Output pairs I/O-2–I/O-3, I/O-4–I/O-5, I/O-6–I/O-7, and I/O-8–I/O-9 in redundant mode. See Installing Output Summer Adapters, on page for more information on making redundant connections. Figure 1-10. SSU-2000 Input/Output Connectors SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 47: Input And Output Adapter Panels
All SSU-2000 connections are made on the rear of the Adapter panels; the connections to the telecommunications system are on the front of the Adapter panels.
Page 48: I/O Adapter Panels For Input And Output Modules
DE9 I/O Adapter for Output Module 100-Channel High-Density Wire-Wrap I/O Adapter for Output Module 80-Channel High-Density Wire-Wrap I/O Adapter for Output Module Figure 1-11. I/O Adapter Panels for Input and Output Modules SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 49: Communications Protocol
GPS receiver or local timing source. The SSU-2000 implements the NTP v.3 (RFC 1305) version. It can run as a server application and a client application. In addition, a broadcast mode may be implemented as either a server or client.
Page 50: Software Versions
Reset connection, and SNMP community settings) are available through SNMP. Refer to the SSU-2000 Technical Reference for more information. Software Versions There are six different versions of software available for the SSU-2000, as indicated Table 1-2. The functionality and commands that are available vary from one version of software version to the next, depending on the specific features of the software package and are described in the SSU-2000 Technical Reference.
Page 51: Graphical User Interface
After initial installation and configuration is completed, the SSU-2000 is capable of unattended operation. After power-up, where the external power supplies are turned on so that they supply power to the main shelf, the SSU-2000 performs a self-diagnostic test routine and properly initializes the hardware. Any active Alarms are time tagged and reported as Events.
Page 52: Indicators And Controls
(EMC) standards for –48/60 VDC powered telecommunication transmission equipment installed in telecommunication centers with inside telecom signal connections. The farthest Expansion shelf may be located up to 200 feet (61 meters) from the SSU-2000 main shelf. SSU-2000 User’s Guide...
Page 53: Functional Overview
1.544 Mbps (DS1) or 2048 kbit/s (E1) using one of three 4 KHz clocks supplied by the clock oscillators in the SSU-2000 main shelf. The phase locked clock signal is buffered and summed with a companion Output module in redundant pairs to generate a set of 20 independent output clock signals for distribution to large networks.
Page 54: Expansion Shelf Features
Clock Source The clock inputs for the first SDU-2000 expansion shelf in an SSU-2000 system are supplied by the A and B Clock modules in the main shelf. A multi-pin connector on the rear panel of the SSU-2000 (labeled J8 SDU Interface) provides the reference signals from the main shelf Clock modules for use by the SDU-2000 expansion shelves.
Page 55: Sdu-2000 Block Diagram
Chapter 1 Product Overview SDU-2000 Synchronization Distribution Unit Figure 1-14. SDU-2000 Block Diagram 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide...
Page 56: Setting The Expansion Shelf Address
The last two module slots in the expansion shelf, labeled A15 and A16, contain the Buffer modules that buffer the corresponding Clock and Communications modules in the main shelf. The buffered signals from these modules are distributed through the motherboard to the Output modules. SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 57: Connector Panel Features
All modules are individually fused to protect the system in case of a short circuit on any one module The SSU-2000 and the SDU-2000 share common Output modules All modules have front panel LED status indicators All modules are equipped with ejector tabs for ease of installation and removal...
Page 58 Chapter 1 Product Overview SDU-2000 Synchronization Distribution Unit SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 59: Chapter 2 Installing The Ssu-2000
Chapter 2 Installing the SSU-2000 This chapter provides guidelines and procedures for installing and powering up the SSU-2000 Synchronization Supply Unit. In This Chapter Unpacking and Inspecting the Shelf Preliminary Procedures Rack Mounting the SSU-2000 Making Ground and Power Connections...
Page 60: Unpacking And Inspecting The Shelf
Chapter 2 Installing the SSU-2000 Unpacking and Inspecting the Shelf Unpacking and Inspecting the Shelf The SSU-2000 is packaged to protect it from normal shock, vibration and handling damage. Care should be taken during unpacking and installation to avoid damaging the unprotected unit.
Page 61: Installation Tools And Materials
ProComm Plus Electromagnetic Interference (EMI) Considerations Electromagnetic interference (EMI) from one instrument can adversely affect the operation of nearby equipment. To prevent the SSU-2000 from interfering with other equipment, it must be installed and operated as described in the following paragraphs.
Page 62: Ventilation Considerations
12 in (30.5 cm), and a width of 19 in (48.3 cm). When installing more than one SSU-2000, each unit must have at least one inch (2.5 cm) of clearance above and below to ensure proper cooling. There should be at least three inches (7.6 cm) of free space below the bottom shelf.
Page 63: Shelf And I/O Adapter Rack Mounting
Chapter 2 Installing the SSU-2000 Rack Mounting the SSU-2000 Use suitable screws for attaching the mounting bracket. Ensure that both brackets are attached at equal distances from the front of the shelf. 2. Mount the instrument to the front of the rack rails with the appropriate number of screws and washers for the rack.
Page 64: I/O Adapter Panels
Output I/O adapter panels below the shelf. Making Ground and Power Connections The SSU-2000 shelf has redundant -48VDC power input connections labeled A-BUS and B-BUS. The A-BUS connection is a 2-position #6 terminal block in the upper left corner of the rear panel, and the B-BUS connection is a 2-position #6 terminal block in the upper right corner of the rear panel.
Page 65: Making Ground Connections
Chapter 2 Installing the SSU-2000 Making Ground and Power Connections Making Ground Connections After the SSU-2000 is installed in a suitable rack, connect the shelf to a proper earth ground. 1. Run a cable from the frame ground (FG) lug to earth ground.
Page 66: Connecting Power
Figure 2-3. Power Terminal Blocks Making Signal Connections Making I/O Connections The SSU-2000 shelf has I/O interface connections for connecting the SSU-2000 to the corresponding I/O adapter panels. Refer to Chapter 7, Input Module Reference Data, and Chapter 8, Output Module Reference Data,...
Page 67: Ssu-2000 Rear Panel
Chapter 2 Installing the SSU-2000 Making Signal Connections All I/O connections are made through the nine 50-Pin Micro-D female connectors, J10 through J18. Each connector is associated with a specific chassis slot. Table lists the relationship between the I/O slot and the rear panel connector.
Page 68: Installing Output Summer Adapters
Output Summer adapter is the same as the I/O interface connectors (see Chapter 7 of the SSU-2000 Technical Reference). You can install the Output Summer adapters before you place the SSU-2000 in-service or after it begins to generate outputs.
Page 69 Making Signal Connections Installing Output Summer Adapters on an In-Service SSU-2000 If you choose to install Output Summer adapters on an SSU-2000 that is generating outputs, you may experience a LOS alarm and possibly a “Module Removed” alarm. The alarms may occur under the following conditions:...
Page 70: Making Communication Connections
7. Dress the cables as appropriate. Making Communication Connections The rear panel of the SSU-2000 shelf has connections for three communications interfaces, two EIA-232 Serial Port connections, and one Ethernet connection. These ports allow communication between the SSU-2000 and a terminal or PC.
Page 71: Dte/Dce Slide Switch
The default EIA-232 settings for both serial ports are 9600 baud, no parity, 8 data bits, 1 stop bit, echo on, ASCII mode, and handshaking disabled. To change these settings, connect the SSU-2000 to a terminal device or PC using a serial communications program protocol. See...
Page 72: Making Ethernet Connections
SSU-2000 shelf to exceed EMC specifications. Remote Reset The SSU-2000 shelf has a remote reset input which can be used to remotely initiate a system reset if you cannot communicate with the shelf using the serial or Ethernet ports. The remote reset connections are made via connector J19, which is a BNO connector labeled REMOTE RESET.
Page 73: Making Alarm Connections
Chapter 2 Installing the SSU-2000 Making Alarm Connections Making Alarm Connections The SSU-2000 has two alarm terminal blocks located on the rear panel for attaching external circuits to the SSU-2000, and are shown in Figure 2-7. Both blocks are nine-position, #6 filtered terminal blocks. The local connections are made on TB1 and the remote connections are made on TB2.
Page 74: Alarm Relay Connections
Energized: alarm COM – NO Perform the following steps to ensure proper alarm connections to the SSU-2000. 1. Remove both fuses from the rear panel. 2. Locate the ALARM terminal blocks connectors labeled MAJOR ALARMS (TB1) and MINOR ALARMS (TB2) on the rear panel.
Page 75: Connecting Antennas
J8, a DB25S female connector with locking post, labeled SDU INTERFACE, and connector J9, a BNO connector labeled SDU BACKUP CLK. These connectors are on the rear panel of the SSU-2000, and are shown in Figure 2-8. The corresponding connectors on the rear panel of the SDU-2000 are shown in Figure 2-9.
Page 76: Sdu Interface (J8) And Backup Clock (J9) Connectors
Figure 2-10. SSU Interface (J8) Expansion Terminator Install the SDU-2000 Expansion shelf using the procedure described in Rack Mounting the SSU-2000, on page 62. Then install power and ground connections using the procedure described in Making Ground and Power Connections, on page SSU-2000 User’s Guide...
Page 77: Connecting A Single Sdu-2000 Expansion Shelf
SDU-2000 installation. 1. Remove the Expansion Terminator (part number 12013040-000-0-1, if installed) from J8 on the rear panel of the SSU-2000. Set the terminator aside for use in step 3, below. 2. Attach one end of the Expansion Cable (part number 12013050-xxx-0; the xxx indicates the length of the cable) to J8 on the rear panel of the SSU-2000.
Page 78: Connecting Additional Sdu-2000 Expansion Shelves
Chapter 2 Installing the SSU-2000 Connecting an SDU-2000 Expansion Shelf Figure 2-11. Wiring Diagram for a Single SDU-2000 Shelf Connecting Additional SDU-2000 Expansion Shelves To connect additional SDU shelves to an SDU, use the following procedure. Figure 2-12 illustrates the wiring for a system with three SDU-2000 shelves.
Page 79 Chapter 2 Installing the SSU-2000 Connecting an SDU-2000 Expansion Shelf Note: Perform step 5 below only if a BNO tee connector is not installed on J16 on the first SDU-2000 shelf. If a tee connector is installed, skip to step 6.
Page 80: Wiring Diagram For Multiple Sdu-2000 Shelves
Chapter 2 Installing the SSU-2000 Connecting an SDU-2000 Expansion Shelf Figure 2-12. Wiring Diagram for Multiple SDU-2000 Shelves SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 81: Handling Modules
Handling Modules Handling Modules The SSU-2000 shelf has twelve plug-in module slots, numbered A1 through A12, from left to right looking at the front of the shelf. Each module slot has a specific address and has two hybrid DIN connectors associated with it on the backplane.
Page 82: Exchanging A Module
Use this procedure to exchange one type of module with the same type or a different type of module in the same slot. The example commands are for slot 3 in the main shelf. 1. Connect to the SSU-2000 using one of the methods described in Establishing a Connection With the SSU-2000, on page 90.
Page 83: Disabling A Module
Use this command to temporarily disable a module without removing it from the SSU-2000 registry. All outputs from the disabled module will turn off, unless a summer adapter is installed on the I/O connector on the rear panel of the shelf. The example commands are for slot 3 in the main shelf.
Page 84: Removing Modules
This procedure describes how to permanently remove a module from the shelf. Note: Modules can be removed and inserted while system power is supplied without damaging modules or affecting system operation. 1. Connect to the SSU-2000 using one of the methods described in Establishing a Connection With the SSU-2000, on page 90.
Page 85: Installation Checklist
2. Remove the A-BUS and B-BUS fuses from the rear of the unit. 3. Ensure shelf and I/O adapters are securely attached to the mounting rack. 4. Ground the SSU-2000 using the Frame Ground lug. 5. Measure between ground and chassis and verify no voltage exists between them.
Page 86: Powering Up The Ssu-2000
–48V Power polarity is reversed Powering Up the SSU-2000 The SSU-2000 is not equipped with a Power switch. Power to the SSU-2000 is controlled by two 5-amp fuses located on the rear of the SSU-2000 main chassis as shown in Figure 2-13.
Page 87: Ssu-2000 Main Shelf
Chapter 2 Installing the SSU-2000 Normal System Indications During Turn-Up SSU-2000 Main Shelf To power up the SSU-2000 main shelf, insert the two fuses into the fuse slots on the rear panel of the SSU-2000 main chassis (see Figure 2-13).
Page 88: After Turn Up
Chapter 2 Installing the SSU-2000 After Turn Up Communications Module – The POWER LED turns green when power is applied to the unit and stays green. The STATUS LED blinks green and amber for approximately 10 to 15 seconds and then stays green. The -48V POWER LEDs A and B turn green to indicate that the power supplies are connected.
Page 89: Chapter 3 Provisioning And Operating The Ssu-2000
Chapter 3 Provisioning and Operating the SSU-2000 This chapter provides operating instructions and software provisioning procedures for the SSU-2000 system. In This Chapter Controls and Indicators Establishing a Connection With the SSU-2000 Overview of the SSU-2000 Security System Adding An Administrator-Level User to the System...
Page 90: Controls And Indicators
Communications module and the remaining two are located on the rear panel of the SSU-2000. The DCE position is for connection to a PC and the DTE position is for connection to a modem.
Page 91: Communicating By Serial Port
2000 This port is designated for TL1 only Communicating by Serial Port Three EIA-232 ports are available on the SSU-2000. Attach a PC with terminal emulation software to one of the ports as shown in Figure 3-1 (this example shows connecting to the local port on the front of the Communications module).
Page 92: Communicating By Ethernet
1. Connect one end of the cable to the serial port on the computer or terminal and the other to the appropriate connector on the SSU-2000. 2. Set the DTE/DCE switch on the rear panel of the SSU-2000 for the type of cable (straight-through or modem).
Page 93: Overview Of The Ssu-2000 Security System
Making Ethernet Connections, on page 72 for details. 2. Telnet from your PC to the IP address assigned to the SSU-2000. 3. Type your user name and press Enter. If you are not assigned as a user in the system, contact the System Administrator.
Page 94: Firmware Requirements For Security Features
TL1 command RTRV-INV, or the ICS command CONFIG. JCC = Japan Composite Clock The SSU-2000 system software allows you to set up a list of users with one of five access levels; each level has an increasing level of access to system functions and commands.
Page 95: Adding An Administrator-Level User To The System
Perform the following steps to add an Administrator-level user to the system. 1. Establish a direct serial connection to the SSU-2000 as described in Communicating by Serial Port, on page 91.
Page 96: Adding Users To The System
Only an Administrator-level user can add new users to the SSU-2000 user list. You can use ICS or TL1 commands. Using ICS Commands 1. Connect a computer to an ICS port on the SSU-2000 and log in using an Administrator-level user name and password, as described in Logging In to the SSU-2000, on page 102.
Page 97 ALIVE DAVID1 ALIVE SSU_2000-> Using TL1 Commands 1. Connect a computer to port 2000 on the SSU-2000 and log in using an Administrator-level user name and password, as described in Logging In to the SSU-2000, on page 102. 2. Type to add a user named SET-USER:::123::ADD,FRANK1,ABC123!,1;...
Page 98: Setting Security Parameters
– Setting a Temporary Password – Enabling, Disabling, and Unlocking Users Using ICS Commands 1. Connect a computer to a serial port on the SSU-2000 and log in using an Administrator-level user name and password, as described in Logging In to the SSU-2000, on page 102.
Page 99 Chapter 3 Provisioning and Operating the SSU-2000 Setting Security Parameters 4. Type and press Enter to set the password to expire in 30 SECURITY AGING 30 days. 5. Type then press Enter to display the last 10 entries in the SECURITY LOG 10 Security log.
Page 100 6. Type the user name, then press Enter. The system unlocks the user. Using TL1 Commands 1. Connect a computer to port 2000 on the SSU-2000 and log in using an Administrator-level user name and password, as described in Logging In to the SSU-2000, on page 102.
Page 101 An Administrator-level user can enable or disable a user from accessing the SSU-2000 without removing the user name from the user table. If a user exceeds the number of failed attempts to log in, then the user name is locked for a period of time.
Page 102: Logging In To The Ssu-2000
Setting Security Parameters Logging In to the SSU-2000 Using ICS Commands 1. Connect a computer to a serial port on the SSU-2000 using the procedure in Establishing a Connection With the SSU-2000, on page 90. A prompt to enter a username appears.
Page 103: Logging In With An Expired Password
ICS or TL1 commands, depending on the port you use. Using ICS Commands 1. Connect a computer to a serial port on the SSU-2000 using the procedure in Establishing a Connection With the SSU-2000, on page 90. A prompt to enter a username appears.
Page 104 CHpater 3 Provisioning and Operating the SSU-2000 Setting Security Parameters Using TL1 Commands 1. Connect a computer to port 2000 on the SSU-2000 using the procedure in Establishing a Connection With the SSU-2000, on page 90. 2. Press the ; key to ensure you have a connection. With an active connection, the...
Page 105: Logging Off Of The Ssu-2000
SSU-2000, and are not intended to cover all combinations of Input and Output modules. You may need to alter the commands in this section to match the configuration of your SSU-2000. Provisioning General Parameters This section describes how to provision the reference mode and the auto-return mode, set the IP address, and name the unit.
Page 106: Adding Or Enabling A Module
CHpater 3 Provisioning and Operating the SSU-2000 Initial Provisioning TL1 command: SET-CLK-AR:::123::ON; 4. Assign a name, if desired, to the SSU-2000. You can assign a of up to 20 [name] characters, starting with a letter; the name is returned as the in responses from the unit.
Page 107: Disabling A Module
Use this command to temporarily disable a module without removing it from the system. The following example procedure disables the module in shelf 1, slot 12. 1. Log into the SSU-2000 using the procedure in Logging In to the SSU-2000, on page 102.
Page 108: Provisioning Gps Input Modules
This section describes how to enable GPS Input modules, if they are installed. You must assign a priority level to each module. You can install GPS Input modules only in slot 3 and slot 5 of the main SSU-2000 shelf. 1. Log into the SSU-2000 using the procedure in...
Page 109: Provisioning Other Input Modules
DS1, E1, or Composite Clock. You must enable and provision each input port as appropriate for the input signal. You can install these Input modules in any slot in the main SSU-2000 shelf. 1. Log into the SSU-2000 using the procedure in Logging In to the SSU-2000, on page 102.
Page 110 8. Provision the Synchronization Status Message (SSM) for each input port to On or Off. When set to On, the SSU-2000 reads and interprets the SQL on the reference. If the reference does not include an SSM, the SQL is defined as STU.
Page 111: Provisioning Output Modules
This section describes how to enable and provision Output modules. such as DS1, E1, or Composite Clock. You must enable and provision each output port as appropriate. You can install Output modules in any slot in the main SSU-2000 shelf and in the SDU-2000 Expansion Shelf.
Page 112: Saving The Provisioning Setup
CHpater 3 Provisioning and Operating the SSU-2000 Initial Provisioning TL1 command: Refer to the SET-PRMTR-OUT commands for the various Output modules in the SSU-2000 Technical Reference. 4. DIsable unused output ports to prevent spurious alarms. Repeat this command for each unused port and slot.
Page 113: Checking Alarm Status
The SSU-2000 is shipped from the factory with all required operational software. The factory default (basic) configuration often does not require further configuration. Refer to the SSU-2000 Technical Reference for a list of the factory default settings and the default Priority Quality Level (PQL) values.
Page 114: Changing Factory Defaults
Changing Factory Defaults Use the following steps to change the factory default or any configuration settings in the SSU-2000. This example changes an alarm from minor to major. 1. Log into the SSU-2000 using the procedure in Logging In to the SSU-2000, on page 102.
Page 115: Customizing Other Configuration Options
Logging In to the SSU-2000, on page 102. 2. Use the ICS or TL1 commands listed in the SSU-2000 Technical Reference to configure the system. Recommendation: Do not perform any command whose function you do not understand. This could result in improper provisioning of the network.
Page 116: Backing Up And Restoring Configurations
This section describes how to back up the configuration files in the SSU-2000 using ICS and TL1 commands. Using ICS Commands 1. Connect a computer to an ICS port on the SSU-2000 and log in using an Administrator-level user name and password, as described in Logging In to the SSU-2000, on page 102.
Page 117: Restoring The Configuration
This section describes how to restore the configuration files in the SSU-2000 using ICS and TL1 commands. Using ICS Commands 1. Connect a computer to an ICS port on the SSU-2000 and log in using an Administrator-level user name and password, as described in Logging In to the SSU-2000, on page 102.
Page 118 CHpater 3 Provisioning and Operating the SSU-2000 Restoring the Configuration 118 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 119: Chapter 4 Commissioning
Chapter 4 Commissioning This chapter includes the commissioning tests for the SSU-2000, which are checklist-based operational tests that field engineers perform at the installation site after completion of installation, system turn-up, and provisioning to verify that the system is correctly installed, configured and operating properly. At this point, the system is ready to be placed in service.
Page 120: Readiness To Test Checklist
Task Checked The SSU-2000 is installed in the rack with a minimum of 3 inches (7.6 cm) of clearance between the bottom of the lowest chassis and the floor or other equipment. An I/O Adapter panel can be installed adjacent to the bottom of the chassis without restricting the necessary cooling airflow.
Page 121: Ssu-2000 Commands
Step Task Checked Turnup has been performed on the SSU-2000 system, user configuration setup and saved and IPs assigned for the Ethernet interface. A System Administrator and user access levels have been assigned to the SSU-2000 (see Chapter 4, Operating and Provisioning Procedures).
Page 122: Commissioning Tests
If an Ethernet connection to a network has been installed, use the following procedure to test the connection. 1. Telnet from the PC to the IP address assigned to the SSU-2000. The system prompts for a user name. 2. Type your assigned username and password and press Enter. The system prompt appears.
Page 123: Testing The Minor Alarms
4. Verify that the MAJOR alarm is reported to the communications terminal. 5. Verify that a MAJOR alarm was logged in the event log: ICS format: EVENT ALARM TL1 format: RTRV-EVENT::S1A2; 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 123...
Page 124: Testing The Critical Alarms
Enter to determine the current selection of input reference signal. Disconnect this input signal and verify a Loss Of Signal (LOS) is reported for the input, and the unit selects an alternate input for the reference signal. 124 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 125: Testing The Clock Section
The PQL will indicate the output SSM level for all ports and is supplied by the selected clock. 3. Verify that all output ports which are intended to be active indicate Y in the port status. 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 125...
Page 126: Testing The System Stability And Accuracy (Optional)
This completes the commissioning tests. The system is ready to be placed in service. Commissioning Test Data Sheet The following test data sheet should be completed as an indicator of operational readiness of the SSU-2000. Table 4-2. Commissioning Test Data Sheet Test Pass...
Page 127: Chapter 5 Maintenance And Troubleshooting
Chapter 5 Maintenance and Troubleshooting This chapter provides preventive and corrective maintenance procedures, equipment re-ordering/return procedures and troubleshooting procedures for the SSU-2000. In This Chapter Responding to SSU-2000 Alarms Preventive Maintenance Corrective Maintenance Troubleshooting Re-ordering Information Contacting Technical Support 12713020-002-2 Revision F.01 – January 2007...
Page 128: Responding To Ssu-2000 Alarms
Caution: To avoid damage to the unit, under no circumstances should the interior chassis of the SSU-2000 be allowed to come in contact with water. Caution: To avoid damage to the unit, never attempt to vacuum the interior of the SSU-2000.
Page 129: Corrective Maintenance
Chapter 5 Maintenance and Troubleshooting Corrective Maintenance Corrective Maintenance The SSU-2000 and SDU-2000 have a modular design and field service is limited to replacing the FRUs (field replaceable units) identified in Table 5-1 Table 5-2. These tables also outline possible component problems and corrective action. Refer...
Page 130: Ssu Corrective Action Table
E1/2048 kHz Output Module 23413292-000-0 2048 kHz Output Module 23413159-000-0 RS 422 Output Module 23413287-000-0 DS1 Dual Line Re-Timing Unit 23413301-000-0 DS1 Quad Line Re-Timing Unit 23413301-001-0 E1 Quad Line Re-Timing Unit 23413309-001-0 130 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 131: Troubleshooting
E1 Quad Line Re-Timing Unit 23413309-001-0 Troubleshooting The SSU-2000 incorporates many alarms and event messages to alert that a possible problem exists. These alarm and event message reports can be accessed via the Communications module serial ports using a dumb terminal or PC.
Page 132: Establishing A Connection
PC with terminal emulation software. This is done using port A or B (located on the rear panel), or the Local, located on the front panel of the communications module. If the SSU-2000 is connected to a LAN, an Ethernet telnet session may be established. Refer to...
Page 133: Interpreting Status Messages
Chapter 5 Maintenance and Troubleshooting Troubleshooting Interpreting Status Messages The SSU-2000 provides two types of status messages: alarm and event. The following sections describe these messages. Alarm Messages With the exception of loss of power alarms (on main chassis and expansion unit) all alarms are module alarms.
Page 134: Ssu-2000 Troubleshooting Procedures
Chapter 5 Maintenance and Troubleshooting Troubleshooting Table 5-3. SSU-2000 Troubleshooting Procedures Troubleshooting Symptom Probable Cause Procedure/Corrective Action No LED lit on any No power to unit Check to ensure that UPS (if applicable) module is operating correctly. Both A and B fuses are blown Remove both fuses and replace.
Page 135 Chapter 5 Maintenance and Troubleshooting Troubleshooting Table 5-3. SSU-2000 Troubleshooting Procedures (Continued) Troubleshooting Symptom Probable Cause Procedure/Corrective Action Fault LED on Loose module Reseat module. Output module is lit Loss of signal to output module Reseat or replace input module (or clock module if necessary).
Page 136: Troubleshooting The Sdu-2000
The Buffer module in the SDU-2000 collects status information from the Output modules and relays status messages to the SSU-2000. The status messages alert the SSU-2000 when a possible problem exists; they can be accessed through the SSU-2000 using a terminal or PC using a terminal emulation software. Refer to...
Page 137: Re-Ordering Information
SSU-2000 Technical Reference. Equipment Return Procedure You should return the equipment to Symmetricom only after you have exhausted the troubleshooting procedures described earlier in this chapter, or if Symmetricom Global Services has advised you to return the unit.
Page 138: Equipment Return Procedure
3. Provide the return shipping information (customer field contact, address, telephone number, and so forth.) 4. Ship the product to Symmetricom, transportation prepaid and insured, with the Return Material Authorization (RMA) number and item numbers or part numbers clearly marked on the outside of the container to the address given to you by Symmetricom Global Services.
Page 139: Chapter 6 Clock And Communications Module Reference Data
Chapter 6 Clock and Communications Module Reference Data This chapter contains reference information for the Clock and Communications modules available for use in the SSU-2000. In This Chapter Stratum 2E Clock Module Stratum 3E Clock Module Type 1 Clock Module Communications Module 12713020-002-2 Revision F.01 –...
Page 140: Stratum 2E Clock Module
DDS circuitry, and generates reference signals used by the input and Output modules. A typical SSU-2000 system contains dual redundant Clock modules. Each Clock module maintains phase synchronization with the redundant Clock module. Its...
Page 141: Functional Block Diagram
Stratum 2E Clock Module Functional Block Diagram A simplified block diagram of the Stratum 2E Clock module is shown in Figure 6-1. Figure 6-1. Block Diagram of the Stratum 2E Clock Module 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 141...
Page 142: Status Led Indicators
On Amber blinking = Clock module Is downloading firmware On (Amber) = Unknown Clock module status or fault detected Selected Green On = Module selected for providing outputs. Off = Module not selected 142 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 143: Functional Specifications
<1 x 10 Warm-up Time (Warm-up Mode) 20 minutes Wander Output (Holdover) Includes effects of all SSU-2000 modules: Compliant with clock levels per ITU-T G.812, T1.101-1999, and Telcordia Technologies GR-378-CORE and GR-1244-CORE. Meets SONET requirements per T1.105. Meets or exceeds performance requirements for ITU-T G.812 Type II and ETSI Transit Node clocks and T1.101 and...
Page 144: Stratum 3E Clock Module
Stratum 3E Clock Module Stratum 3E Clock Module This section provides user reference information for the Stratum 3E Clock module (part number 23413015-000-0) used in the SSU-2000. This module provides a lower cost backup clock solution for the system. Functional Overview...
Page 145: Functional Block Diagram
Stratum 3E Clock Module Functional Block Diagram A simplified block diagram of the Stratum 3E Clock module is provided in Figure 6-3. Figure 6-3. Block Diagram of the Stratum 3E Clock Module 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 145...
Page 146: Status Led Indicators
Green On = Module selected for providing outputs Off = Module not selected WARMUP Amber On = Clock module is in warm-up mode Off = Clock module has completed warmup 146 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 147: Performance Specifications
Tuning Resolution (Locked Mode) <1 x 10 Warm-up Time (Warm-up Mode) 20 minutes Wander Output (Holdover) Includes effects of all SSU-2000 modules: Exceeds requirements of (ANSI) T1.101-1994, T1.105.09, ITU G.811, T1X1.3 (proposed new limits for wander generation), and G.823 Jitter (Locked or Holdover) <...
Page 148: Type 1 Clock Module
DDS circuitry, and generates reference signals used by the Input and Output modules. A typical SSU-2000 shelf contains dual redundant Clock modules. Each Clock module maintains phase synchronization with the redundant Clock module. Its hardware and software also provides an initial offset adjustment and frequency adjustment resolution of 1 x 10 or better.
Page 149: Functional Block Diagram
Type 1 Clock Module Functional Block Diagram A simplified block diagram of the Type 1 Clock module is shown in Figure 6-5. Figure 6-5. Block Diagram of the Type 1 Clock Module 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 149...
Page 150: Status Led Indicators
On = Module selected for providing clock signals for output generation. Off = Module not selected Warmup Amber On = Clock module is in warm-up mode Off = Clock module has completed warmup 150 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 151: Functional Specifications
Warm-up Time (Warm-up Mode) 20 minutes Wander Output (Holdover) Includes effects of all SSU-2000 modules: Compliant with clock levels per ITU-T G.812, Type 1 and ETSI EN300 462-4 Jitter (Locked or Holdover) < 4 ns p-p (measured at the CLKA/BIN 8 kHz output) Starting Time Constant (min tau) 150 to 1200 (Min Tau must be <...
Page 152: Communications Module
Functional Overview The Communications module installs in slot A2 and provides an interface between the user and the SSU-2000. This interface allows users to display and control much of the activity in the SSU-2000 shelf and the optional SDU-2000 expansion shelf.
Page 153: Functional Block Diagram
Chapter 6 Clock and Communications Module Reference Data Communications Module Functional Block Diagram A simplified block diagram of the Communications module is shown in Figure 6-7. Figure 6-7. Block Diagram of the Communications Module 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 153...
Page 154: Status Led Indicators
On = The module is receiving power Off = No Power Present Status Green/Amber On (Green) = No faults detected On (Amber) Blinking = Module is downloading firmware On (Amber) = Module fault detected 154 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 155: Communications Module Alarm Logic
List of events based upon a start and stop time Clear the event log Interactive mode ports can request: Latest event logged A number of last events be displayed All information currently logged in the history buffer 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 155...
Page 156: Eia-232 Ports
MAJOR Alarms – A class of alarms that may require immediate user intervention. When a major alarm condition is detected, the major alarm relay on the rear panel of the SSU-2000 is activated and the MAJOR ALARM LED on the front of the Communications module lights red.
Page 157: Ethernet Port
The recessed RST button on the front panel of the Communications module resets the software. Use this button only if you cannot acquire access to the SSU-2000 using the serial or Ethernet ports. A contact closure on the Remote Reset connector...
Page 158 Chapter 6 Clock and Communications Module Reference Data Communications Module 158 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 159: Chapter 7 Input Module Reference Data
1-Port and 3-Port E1 Input Modules 1-Port and 3-Port DS1 Input Modules GPS Input Module Composite Clock Input Module Japanese Sine Wave Input Module Japanese Composite Clock Input Module Input Adapter Panels 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 159...
Page 160: 1-Port And 3-Port E1 Input Modules
(at a sampling rate of 40 Hz) with the Clock modules that are installed in the SSU-2000. The Clock modules use this information to phase lock to the incoming signal. The data may also be used for monitoring the frequency of incoming signals.
Page 161: Functional Block Diagram
To prevent confusing frequency offsets with phase jumps, the phase build-out algorithm does not build out more than eight consecutive samples. If the phase is built out, the Input module sends an event message to the Communications module. 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 161...
Page 162 PBO functionality using ICS, TL1, or SNMP commands. The PBO functionality has been moved into the Clock module and is not under software control. If you do not disable the SSU-2000's Input PBO setting, it will conflict with the PBO function in the Clock module.
Page 163: E1 Input Module Alarm Modes
Cannot be elevated to a higher severity level REPORT Do nothing Cannot be elevated to a higher severity level MINOR Generate event message Elevate to Major if the alarm condition persists beyond the user-set elevation time limit 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 163...
Page 164 Once this error count exceeds a user-set limit, the input signal which has experienced the errors said to be in episode. Refer Changing Factory Defaults, on page 114, for more information on setting the error count. 164 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 165 The Input module does not report alarms below the level of an active alarm. Cesium Fault Facilitates compatibility with older Hewlett Packard units Only valid if port one is configured to receive an unframed input signal 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 165...
Page 166: E1 Input Module Event Reporting
Old PQL Phase Buildout Phase value being built out Corrected phase value Configuration Changes New Value (if necessary) Old Value (if not implied by new value) Input phase zeroed – – 166 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 167: Status Led Indicators
On (Green) = Enabled and signal valid, no major alarms On (Amber) = Enabled and signal not valid Off = Disabled PORT 2 REF Green/Amber On = Selected Reference Off = Disabled, or good and not selected 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 167...
Page 168: Configuration Options
12 000 0 to 10 000 000 FREQ Clear Clk B 12 000 0 to 10 000 000 Frequency Alarm Mode Major Ignore | Report | Minor | Major | Critical 168 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 169 Alarm Elevation Time 86 400 s 60 to 500 000 s, 0 is disabled Port Status Disabled Enabled | Disabled Port Name None Any string from 0 to 20 characters 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 169...
Page 170: 1-Port And 3-Port Ds1 Input Modules
The 1-Port and 3-Port DS1 Input modules receive signals and perform phase measurement comparisons with the Clock modules that are installed in the SSU-2000. The Clock modules use this information to phase and frequency lock to the incoming signal. The data may also be used for monitoring the frequency of incoming signals.
Page 171: Functional Block Diagram
Block Diagram of the 1-Port and 3-Port DS1 Input Module Phase Measurement Averages The Input module also maintains averages of past phase measurements including: 1000 one-second averages 1000 100-second averages 100 1000-second averages 10 10 000-second averages 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 171...
Page 172 PBO functionality using ICS, TL1, or SNMP commands. The PBO functionality has been moved into the Clock module and is not under software control. If you do not disable the SSU-2000's Input PBO setting, it will conflict with the PBO function in the Clock module.
Page 173: Ds1 Input Module Alarm Modes
Elevate to Critical if the alarm condition persists beyond the user-set elevation time limit CRITICAL Generate event message Cannot be elevated as there is no higher severity level Fault Port 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 173...
Page 174 The duration of a brief occurrence of LOS is defined by the value of the error count for LOS Once in episode: Log LOS alarm, taking appropriate action per the assigned severity level Invalidate current phase measurements 174 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 175 DS1 Input Module Events Reported The 3-Port DS1 Input module reports the event types listed in Table 7-6 when they occur. See Chapter 6 of the SSU-2000 Technical Reference for more information on events. 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 175...
Page 176: Ds1 Input Module Event Reporting
Old PQL Phase Buildout Phase value being built out Corrected phase value Configuration Changes New Value (if necessary) Old Value (if not implied by new value) Input phase zeroed – – 176 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 177: Status Led Indicators
On (Green) = Enabled and signal valid, no major alarms On (Amber) = Enabled and signal not valid Off = Disabled PORT 2 REF Green On = Selected Reference Off = Disabled, or good and not selected 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 177...
Page 178: Configuration Options
FREQ Clear Clk B 12 000 0 to 10 000 000 Frequency Alarm Mode Major Ignore | Report | Minor | Major | Critical MTIE T10 Set Limit1 0 to 60 000 178 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 179 Alarm Elevation Time 86 400 s 60 to 500 000 s, 0 is disabled Port Status Disabled Enabled | Disabled Port Name None Any string from 0 to 20 characters 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 179...
Page 180: Gps Input Module
GPS Input Module This section provides user-reference data for the GPS Input module (part number 23413019-000-0) that is used in the SSU-2000 main chassis to provide a timing reference signal to phase and frequency lock the internal clocks and to produce phase locked output signals.
Page 181: Functional Block Diagram
Chapter 7 Input Module Reference Data GPS Input Module Functional Block Diagram A simplified block diagram of the GPS Input module is shown in Figure 7-5. Figure 7-5. Block Diagram of the GPS Input Module 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 181...
Page 182: Status Led Indicators
On = Selected Reference Off = Disabled, or good and not selected TRACK Green/Amber On (Green) = Radio is tracking On (Amber) = Tracking problem without antenna fault Blinking (Amber) = Antenna fault 182 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 183: Configuration Options
0 to 60 000 MTIE T1K Set Limit2 1010 0 to 60 000 MTIE T10K Set Limit 1 0 to 60 000 MTIE T10K Set Limit 2 1100 0 to 60 000 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 183...
Page 184: Composite Clock Input Module
Functional Overview The Composite Clock Input module conditions a composite clock input signal that is used to control the frequency of the Clock modules. When the SSU-2000 is in the Subtending mode, it also produces a 4 kHz synchronization signal, which determines the phase of the composite clock signals generated by Composite Clock Output modules.
Page 185: Functional Block Diagram
Composite Clock Input Module Functional Block Diagram A simplified block diagram of the Composite Clock Input module is shown in Figure 7-7. Figure 7-7. Block Diagram of the Composite Clock Input Module 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 185...
Page 186: Status Led Indicators
Off = Disabled, or good and not selected INPUT Green/Amber On (Green) = Enabled and signal valid, no major alarms On (Amber) = Enabled and signal not valid Off = Disabled 186 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 187: Configuration Options
Clock module A and Clock module B using the reference input signals. These measurements are used to adjust the frequency of the oscillators on the two Clock modules. 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 187...
Page 188: Functional Block Diagram
If the phase is built out, the system can be provisioned to generate events indicating that a PBO (phase build-out) has occurred. 188 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 189 PBO functionality using ICS, TL1, or SNMP commands. The PBO functionality has been moved into the Clock module and is not under software control. If you do not disable the SSU-2000's Input PBO setting, it will conflict with the PBO function in the Clock module.
Page 190 The duration of a brief occurrence of LOS is defined by the value of the error count for LOS Once in episode: Log LOS alarm, taking appropriate action per the assigned severity level Invalidate current phase measurements 190 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 191: Status Led Indicators
If the MTIE values for a selected clock exceed either of the MTIE masks, the Input module takes appropriate action according to the severity level associated with the MTIE alarms. Refer to the ALARM command described in the SSU-2000 Technical Reference for more information on alarm settings.
Page 192: Configuration Options
0 to 10 000 000 FREQ Set ClkB 16000 0 to 10 000 000 FREQ Clear ClkA 12000 0 to 10 000 000 FREQ Clear ClkB 12000 0 to 10 000 000 192 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 193 Alarm Elevation Time 86 400 s 60 to 500 000 s, 0 is disabled Port Status Disabled Enabled | Disabled Port Name None Any string from 0 to 20 characters 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 193...
Page 194: Japanese Composite Clock Input Module
The Input module conditions a composite clock input signal that is used to control the frequency of the Clock modules. When the SSU-2000 is in the Subtending mode, it also produces a 4 kHz synchronization signal that determines the phase of the composite clock signals generated by Japanese Composite Clock Output modules.
Page 195: Functional Block Diagram
Japanese Composite Clock Input Module Functional Block Diagram A simplified block diagram of the Input module is shown in Figure 7-11. Figure 7-11. Block Diagram of the Japanese Composite Clock Input Module 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 195...
Page 196: Status Led Indicators
On = Selected Reference Off = Disabled, or good and not selected INPUT Green/Amber On (Green) = Enabled and signal valid On (Amber) = Enabled and signal not valid Off = Disabled 196 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 197: Configuration Options
Input Adapter Panels This section describes the input adapters available to connect typical telecommunications signals to the rear panel of the SSU-2000 and SDU-2000. Input Adapter Panel for 1-Port Input Module Symmetricom offers three Input Adapter panels for use with 1-port Input modules.
Page 198: Input I/O Adapter For One-Port Input Modules
Table 7-17. Pinout for the I-Port Input Adapter Description Sleeve Sleeve Ring Flt Return Note: When connected to J1 on the rear panel, Pin 8 is Cs Fault. Only when connected to J1 on the rear panel. 198 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 199: Input Adapter Panel For 3-Port Input Modules
Chapter 7 Input Module Reference Data Input Adapter Panels Input Adapter Panel for 3-Port Input Modules Symmetricom offers four Input Adapter panels for use with 3-port Input modules. Each panel has the following common features: Accommodates up to three separate input signals...
Page 200: Input Wire-Wrap Adapters
Figure 7-15. These adapters connect directly to the I/O ports on the rear panel of the SSU-2000 or SDU-2000 shelf. Table 7-19. Input Wire-Wrap Adapters Part Number...
Page 201: Input Wire-Wrap Adapter
Chapter 7 Input Module Reference Data Input Adapter Panels Figure 7-15. Input Wire-Wrap Adapter 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 201...
Page 202 Chapter 7 Input Module Reference Data Input Adapter Panels 202 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 203: Chapter 8 Output Module Reference Data
Chapter 8 Output Module Reference Data This chapter contains reference information for the Output modules available for use in the SSU-2000 and SDU-2000. In This Chapter E1 Output Module DS1 Output Module Composite Clock Output Module Japanese Composite Clock Output Module...
Page 204: E1 Output Module
SDU-2000 Expansion shelf. Functional Overview The E1 Output module uses one of three 4 kHz clocks from the SSU-2000 main chassis backplane to generate a phase-locked signal of 2.048 Mbps. If the unit is inserted into an SDU-2000 expansion shelf, a fourth 4kHz clock (D-clock) is available.
Page 205: Functional Block Diagram
Chapter 8 Output Module Reference Data E1 Output Module Functional Block Diagram A simplified block diagram of the E1 Output module is shown in Figure 8-1. Figure 8-1. Block Diagram of the E1 Output Module 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 205...
Page 206: Status Led Indicators
On (Green) = Clock B in slot 12 is the selected source clock On (Amber) = Faulty or missing Clock B Off = Clock B is good and not selected 206 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 207: Performance Specifications
Rise time <100 ns Pulse Width 244 ns, nominal into 120Ω Pulse Interval 488 ns, nominal Duty Cycle Pulse Amplitude 2.2 to 3.3 Vpp Jitter < 0.01 UI Number of Outputs 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 207...
Page 208: Ds1 Output Module
The DS1 Output module generates a phase-locked signal of 1.544 MHz using one of three 4 kHz clocks from the backplane of the SSU-2000 main shelf (A, B, and, C clocks). If the module is inserted into the SDU-2000 Synchronization Distribution Unit (expansion shelf), a fourth 4 kHz clock (D clock) is available.
Page 209: Status Led Indicators
On = +5 V DC power available on the Output module STATUS Green/Amber On (Green) = Module functioning correctly Blinking = Output module is disabled or downloading firmware On (Amber) = Output module failure 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 209...
Page 210: Performance Specifications
Per (ANSI) T1.102 and ITU Rec. G.703 Rise time <100 ns Pulse Width 324 ns, nominal into 100Ω Pulse Interval 648 ns, nominal Duty Cycle Pulse Amplitude 2.4 to 3.6 Vpp Jitter < 0.01 UI 210 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 211: Composite Clock Output Module
Composite Clock Output Module Composite Clock Output Module This section provides reference data for the Composite Clock Output module (part number 23413158-000-0) used in both the SSU-2000 main shelf and in the optional SDU-2000 Expansion shelf. Functional Overview The Composite Clock Output module generates 20 signal pairs (TTIP and TRING signal pairs).
Page 212: Functional Block Diagram
Composite Clock Output Module Functional Block Diagram A simplified block diagram of the Composite Clock Output module is shown in Figure 8-5. Figure 8-5. Block Diagram of the Composite Clock Output Module 212 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 213: Status Led Indicators
On (Green) = Clock B in slot 12 is the selected source clock On (Amber) = Faulty or missing Clock B Off = Clock B is good and not selected 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 213...
Page 214: Performance Specifications
7.8 μs ±2% for 50/50 duty cycle 15.6 μs, nominal Pulse Interval Duty Cycle 62.5/37.5 or 50/50 selectable 2.7 to 5.5 Vpk, 3.5 Vpk nominal into 133 Ω Pulse Amplitude Number of Outputs 20 Independent Channels 214 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 215: Japanese Composite Clock Output Module
Japanese Composite Clock Output Module Japanese Composite Clock Output Module This section provides reference data for the Japanese Composite Clock Output module (part number 23413306-000-0) used in both the SSU-2000 main shelf and in the optional SDU-2000 Expansion shelf. Functional Overview The Output module generates 20 non-summable signal pairs (TTIP and TRING signal pairs).
Page 216: Functional Block Diagram
Japanese Composite Clock Output Module Functional Block Diagram A simplified block diagram of the Japanese CC Output module is shown in Figure 8-7. Figure 8-7. Block Diagram of the Japanese Composite Clock Output Module 216 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 217: Status Led Indicators
On (Green) = Clock B in slot 12 is the selected source clock On (Amber) = Faulty or missing Clock B Off = Clock B is good and not selected 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 217...
Page 218: Configuration Options
Subtending mode 825, 550, and 275 feet) Port Label (Per Port) Null 0 – 20 ASCII printable characters. Alarm Elevation 86 400 seconds 60 – 500 000 seconds 0 is disabled 218 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 219: Japanese Sine Wave Output Module
Functional Overview The Output module uses one of three 4 kHz clocks from the SSU-2000 main chassis backplane to generate a phase-locked reference signal for the synchronized clock output signals. If the unit is inserted into an SDU-2000 expansion shelf, a fourth 4 kHz clock (D-clock) is available.
Page 220 Use the TL1 command RTRV-PRMTR-OUTSINE to view the output frequency setting. To provision the output parameters, use the TL1 command SET-PRMTR-OUTSINE. Note: For syntax descriptions, refer to the SSU-2000 Technical Reference. Output Squelching The Output module allows you to selectively turn off (squelch) the outputs during periods of degraded performance.
Page 221: Using The Hex Number To Identify Output Ports
Port Port Port Digit 1 Digit 2 Digit 3 Digit 4 Digit 5 – – – – – – – – – – – – – – – – – 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 221...
Page 222 Major 1A06 (05) Clk-D Major 1A06 (06) Clk Selected Major 1A06 (07) VCXO Major 1A06 (08) PLL Major 1A06 (09) Sync Major 1A06 (10) Squelch Major 1A06 (11) PortFlt Major 222 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 223 P[ 6]= 0, P[ 7]= 0, P[ 8]= 0, P[ 9]= 0, P[10]= P[11]= 0, P[12]= 0, P[13]= 0, P[14]= 0, P[15]= P[16]= 0, P[17]= 0, P[18]= 0, P[19]= 0, P[20]= 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 223...
Page 224: Status Led Indicators
On (Green) = Clock B in slot 12 is the selected source clock On (Amber) = Faulty or missing B source clock Off = Source B is good and not selected 224 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 225: Configuration Options
0 is disabled E1/2048 kHz Output Module This section provides reference data for the E1/2048 kHz Output module (part number 23413292-000-0) designed for use in the SSU-2000 Synchronization Supply Unit. 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 225...
Page 226: Functional Overview
(AMI) encoding. When zero suppression is on, HDB3 encoding is used. The output SSM can be automatically set by the input signal or manually using an ICS or TL1 command. See the SSU-2000 Technical Reference for details on setting the output SSM.
Page 227: Using The Hex Number To Identify Output Ports
1 through 4, the second digit represents ports 5 through 8, and so on, as shown in Figure 8-12. Figure 8-12. Using the Hex Number to Identify Output Ports 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 227...
Page 228 Squelching. Use the ALARM command or the command SET-PRMTR-OUTE12048 (described in the SSU-2000 Technical Reference) to provision these alarms to Ignore, Report Only, Minor Alarm, Major Alarm (default), or a Critical Alarm. 228 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 229 Input modules and connect an input signal to the module: DS1, E1, or CC. If the SSU-2000 has only GPS Input module(s), then set the Bypass mode to OFF to prevent the Output modules from generating the CLK-C alarm (alarm 4).
Page 230: Functional Block Diagram
/ / / / /I/ /E/ / /N/N/N/ / / / / / / / / Functional Block Diagram A simplified block diagram of the E1/2048 kHz Output module is shown in Figure 8-13. Figure 8-13. Block Diagram of the E1/2048 kHz Output Module 230 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 231: Status Led Indicators
On (Green) = Clock B in slot 12 is the selected source clock On (Amber) = Faulty or missing Clock B Off = Clock B is good and not selected 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 231...
Page 232: Performance Specifications
ITU-T G.703/9 (10/98) Signal Clock Clock Format None None Twisted pair, 120 Ω Coaxial, 75 Ω Cable Maximum Peak Voltage 1.90 V 1.50 V Minimum Peak Voltage 1.00V 0.75 V 232 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 233: 2048 Khz Output Module
This section provides reference data for the 2048 kHz Output module (part number 23413159-000-0). It also contains default provisioning settings, and procedures for connecting to the SSU-2000 in order to enable, provision, and disable the module. Functional Overview The 2048 kHz Output module receives a set of three (four if installed in an expansion shelf) 4 kHz clocks from the Clock modules and uses these clocks to develop an 8.192 MHz phase-locked signal.
Page 234: Block Diagram Of The 2048 Khz Output Module
Revision D or later firmware. This feature allows you to turn off any of 20 output ports on redundant or non-redundant modules. The SSU-2000 uses the system Priority Quality Level (PQL) to determine when the system is operating within specified limits; if the outputs become degraded, then the system automatically turns off the affected ports.
Page 235: Using The Hex Number To Identify Output Ports
1 and 3 (corresponding to the A in Digit 1), 6 and 8 (corresponding to the 5 in Digit 2), 16 (corresponding to the 1 in Digit 4), and 17 through 20 (corresponding to the F in Digit 5). 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 235...
Page 236 2A10 (02) Clk-A Major 2A10 (03) Clk-B Major 2A10 (04) Clk-C Major 2A10 (05) Clk-D Major 2A10 (06) Clk Level Major 2A10 (07) Clk Selected Major 2A10 (08) VCXO Major 236 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 237: Status Led Indicators
Provisioning the Squelch Parameter To view or provision the squelch using ICS commands, see the OUTPUT command description in the SSU-2000 Technical Reference. To provision the squelch using TL1 commands, refer to the Set 2048 kHz Output Parameters section in the SSU-2000 Technical Reference.
Page 238: Performance Specifications
1.0 to 1.9 Vpk, 1.5 Vpk nominal into 120 Ω Pulse Amplitude 0.75 to 1.5 Vpk, 1.0 Vpk nominal into 75 Ω ≤0.01 UIpp, 20 Hz to 100 kHz Jitter Number of Outputs 20 Independent 238 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 239: Rs-422 Output Module
RS-422 Output Module RS-422 Output Module This section provides reference data for the RS-422 Output module (part number 23413287-000-0) designed for use in the SSU-2000 Synchronization Supply Unit. Functional Overview The RS-422 Output module generates 10 balanced square-wave outputs (TTIP and TRING signal pairs) and 10 single-ended (Ring) square-wave outputs.
Page 240: Block Diagram Of The Rs-422 Output Module
Revision D or later firmware. This feature allows you to turn off any of 20 output ports on redundant or non-redundant modules. The SSU-2000 uses the system Priority Quality Level (PQL) to determine when the system is operating within specified limits; if the outputs become degraded, the module automatically turns off the affected ports.
Page 241: Using The Hex Number To Identify Output Ports
1 through 4, the second digit represents ports 5 through 8, and so on, as shown in Figure 8-19. Figure 8-19. Using the Hex Number to Identify Output Ports 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 241...
Page 242 RS-422 Output module alarms, including Alarm #14, Squelching. Use the Alarm command to provision these alarms to Ignore, Report Only, Minor Alarm, Major Alarm (default), or a Critical Alarm. 242 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 243: Status Led Indicators
SSU-> Provisioning the Squelch Parameter To view or provision the squelch using ICS commands, see the OUTPUT command description in the SSU-2000 Technical Reference. To provision the squelch using TL1 commands, refer to the SSU-2000 Technical Reference. Status LED Indicators The RS-422 Output module has seven LED status indicators along the front edge of the module that are used for visually conveying status information to the user.
Page 244: Performance Specifications
Differential square wave, 50/50 duty cycle Single-ended square wave, 50/50 duty cycle Rise/Fall time < 50 ns <0.03 UI up to 1.96 MHz Jitter Number of Outputs 10 differential 10 single-ended 244 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 245: Ds1 Line Retiming Unit (Lru)
DS1 Line Retiming Unit (LRU) This section provides information on the installation and operation of the DS1 Line Re-timing Unit (LRU) designed for operation in the SSU-2000 Synchronization Supply Unit and the SDU-2000 Expansion shelf. It provides a list of new TL1 and ICS commands for the LRU along with some examples of how to use the commands.
Page 246 Note: Side 1 is the “3R” port, and is sometimes known as East. Side 2 is the “2R” port, and is sometimes known as West. The LRM is installed into an SSU-2000 plug-in module slot and is configured as an output. The CTA plugs into the LRM’s corresponding rear panel connector and provides a path for the DS1 signal if the unit loses power, or if the main re-timing module is removed.
Page 247: Functional Overview
The Line Re-timing Module (LRM) consists of the following functional blocks: Microcontroller unit Memory (FLASH and RAM) LED indicators (module and port status) Figure 8-22 is a block diagram of the DS1 LRU module. 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 247...
Page 248: Block Diagram Of The Ds1 Lru Module
The module has 512 Kilobytes of RAM for dynamic memory storage with 256 Kilobytes of FLASH memory used to store the program code and configuration information for the FPGA. 248 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 249: Status Led Indicators
On (Amber) = CTA not connected or CTA mismatch Off = CTA not connected and alarm set to ignore FAULT REF Green/Amber On (Green) = Clock reference selected On (Amber) = Clock reference not selected 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 249...
Page 250: Installing The Line Re-Timing Unit
Cut-Through Assembly (CTA) in an SSU-2000 and in an SDU-2000. Installing the Line Re-Timing Module in the SSU-2000 The SSU-2000 shelf has twelve plug-in module slots. The slots are numbered A1 through A12, from left to right looking at the front of the shelf. When you install a...
Page 251: Recommended Ssu-2000 Slots For Installing The Ds1 Lrm
Chapter 8 Output Module Reference Data DS1 Line Retiming Unit (LRU) Figure 8-24. Recommended SSU-2000 Slots for Installing the DS1 LRM Installing the LRM in the SDU-2000 The SDU-2000 shelf has sixteen plug-in module slots. The slots are numbered A1 through A16, from left to right looking at the front of the shelf.
Page 252: Sdu-2000 Recommended Slots For Ds1 Lrm Installation
Installing a Cut-Through Assembly in the SSU-2000 The SSU-2000 shelf has I/O interface connections on the rear panel for connecting the SSU-2000 to the corresponding I/O adapter panels. The LRM I/O connections are made from the 50-pin Micro-D female connectors on the SSU-2000 rear panel, through the CTA, and to the adapter panel using the appropriate cable.
Page 253 Assembly on top of a Summer Adapter. Figure 8-26. Installing the Cut-Through Assembly in the SSU-2000 Use the following steps to install the Cut-Through Assembly on an SSU-2000. Refer Table 8-23 for a description of the SSU-2000 and CTA I/O connector pin functions...
Page 254: Installing The Cut-Through Assembly In The Sdu-2000
Figure 8-27. Installing the Cut-Through Assembly in the SDU-2000 Use the following steps to install the Cut-Through Assembly on an SDU-2000. Refer Table 8-23 for a description of the SSU-2000 and CTA I/O connector pin functions and to Figure 8-28 for pin orientation.
Page 255 Chapter 8 Output Module Reference Data DS1 Line Retiming Unit (LRU) 3. Tighten all CTA connector screws securely. 4. Connect the 50-pin Micro-D output cables as required for your application. Table 8-23. SSU-2000 and CTA I/O Pin Description Function Function CTA Pin...
Page 256: Orientation Of The Ssu-2000 I/O And Cta I/O Connector Pins
Chapter 8 Output Module Reference Data DS1 Line Retiming Unit (LRU) Figure 8-28. Orientation of the SSU-2000 I/O and CTA I/O Connector Pins Installing the Optional Wire-Wrap Panel Overlay The adapter panel identification overlay is a user-installed label that identifies each port’s side 1 and side 2 wire-wrap pins (see...
Page 257: Specifications
Provisioning the DS1 Line Re-timing Module The following information provides examples of how to use ICS and TL1 commands to provision a DS1 Line Re-timing module in an SSU-2000. Refer to the SSU-2000 Technical Reference for details on ICS and TL1 commands.
Page 258: Alarms And Events
Enter LRM 1A7-4 CID 1A7-4 SET-PRMTR-LRMCID::S1A7-4:::1A7-4; Alarms and Events The SSU-2000 Technical Reference contains a list of the DS1 LRM alarms and events. E1 Line Re-timing Unit This section provides information on the installation and operation of the Symmetricom E1 Line Re-timing Module (LRM) designed for operation in SSU-2000 Synchronization Supply Unit and the SDU-2000 Expansion Unit.
Page 259: E1 Lrm Block Diagram
Power input regulation Microcontroller unit Memory (FLASH and RAM) LED indicators (module and port status) Figure 8-30 is a block diagram of the E1 LRM module. Figure 8-30. E1 LRM Block Diagram 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 259...
Page 260: Status Led Indicators
Eight LEDs on the front panel show the current operating status of the module. The LEDs are shown in Figure 8-30 and are described in Table 8-25. Figure 8-31. Front Panel of the E1 LRM 260 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 261: Installing The E1 Line Re-Timing Module
On (Amber) = Clock reference not selected Installing the E1 Line Re-timing Module You can install the E1 LRM in any available I/O slot on both the SSU-2000 shelf and the SDU-2000 Expansion Shelf. The I/O slots on the SSU-2000 are labeled A3 through A11.
Page 262: Installing The Output Panels
2. Mount the panels to the front of the rack rails with four screws and washers. 2. Mount the panels to the front of the rack rails with four screws and washers. Figure 8-32. Sample Rack Mounting with Input Module, SSU-2000, and Output Panel 262 SSU-2000 User’s Guide...
Page 263: Specifications
Provisioning the E1 Line Re-timing Module The following information provides examples of how to use ICS and TL1 commands to provision an E1 Line Re-timing module in an SSU-2000. Refer to the SSU-2000 Technical Reference for details on TL1 and ICS commands.
Page 264: Alarms And Events
To use TL1 commands to set the circuit ID of port 4 on an E1 LRM in slot 7 of shelf 1 to 1A7-4, issue the command: SET-PRMTR-LRMCID::S1A7-4:::1A7-4; Alarms and Events The SSU-2000 Technical Reference contains a list of the E1 LRM alarms and events. Buffer Module This section describes the Buffer module (part number 23413122-000-0) used in the SDU-2000 Expansion shelf.
Page 265: Front Panel Of The Buffer Module
Off = Loss of input Power A –48V Power B Green/Amber On (Green) = Receiving input power from Power B On (Amber) = Power connections reversed Off = Loss of input Power B 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 265...
Page 266: Output Adapter Panels
Output Adapter Panels Balun Output Adapter Panel Symmetricom offers four Balun Output Adapter panels for use with 2048 kHz and E1 Output modules. One adapter panel is required for each Output module in the shelf. You need one Output cable (see...
Page 267: High-Density Wire-Wrap Output Panels
Output Adapter Panels High-Density Wire-Wrap Output Panels Symmetricom offers two high-density wire-wrap panels that can be used for any of the Output modules. A 100-output panel is available for 23” racks, and an 80-output panel is available for 19” racks. You need four Output cables to connect the 80-output Adapter panel to the shelf and five Output cables to connect the 100-output Adapter panel to the shelf.
Page 268 Cable, 50-pin SCSI, 1.7 m long 060-10003-18-2 Cable, 50-pin SCSI, 1.8 m long 060-10003-19-2 Cable, 50-pin SCSI, 1.9 m long 060-10003-19-2 Cable, 50-pin SCSI, 2.0 m long 805SCSI-TLCO Cable, 50-pin SCSI, to 50-pin TELCO connector 268 SSU-2000 User’s Guide 12713020-002-2 Revision F.01 – January 2007...
Page 269: Chapter 9 Hardware Configuration Guide
Chapter 9 Hardware Configuration Guide This chapter describes how to configure the SSU-2000 into a variety of telecommunications configurations, depending on which modules are installed. In This Chapter Configuring a Conventional SSU/TSG System Configuring a Primary Reference Source (PRS) System...
Page 270: Configuring A Conventional Ssu/Tsg System
Seven 1.0-inch wide filler panels and one 3-1/2” wide filler panel Configuring a Primary Reference Source (PRS) System In a Primary Reference Source (PRS) configuration, the SSU-2000 meets the specifications defined in American National Standards Institute (ANSI) T1.101-1994. ANSI defines a Primary Reference Source as “equipment that...
Page 271: Configuring A Monitor-Only System
Configuring a Monitor-Only System In a monitor-only configuration, no output signals are required. One of the inputs is designated as the reference, and the SSU-2000 Clock module is locked directly to this signal. All remaining input signals are then compared to the phase-locked oscillators (and indirectly to the designated input reference).
Page 272: Configuring A Subtending Ssu
One-Port Input Modules Configuring a Subtending SSU The SSU-2000 configured as a Subtending Synchronization Supply Unit (SSU) provides remote phase synchronization and holdover capabilities to telecom network elements, such as digital switches, Digital Access Crossover Systems (DACS), and channel banks for customers with very large equipment offices.
Page 273: Functional Description
Subtending SSU configuration. Functional Description The SSU-2000 configured as a Subtending SSU broadens the Symmetricom SSU-2000 family of products by providing subtending clock functionality when referenced to a master TSG/BITS equipped with a Stratum 3E or better clock. The following combination of hardware and software configuration meets Subtending SSU criteria described in Section 7 of Telcordia Specification GR-378-CORE.
Page 274 A valid CC/JCC input is required when starting the Subtending mode in order to align the phase of the CC/JCC outputs. Note: When provisioning the SSU-2000 to phase align Composite Clock Outputs (CC, JCC, or JCC4) to Composite Clock Inputs (CC, JCC, or JCC4) you can instruct the SSU to transition or change modes of operation (Normal, Subtending, Japanese Subtending).
Page 275: Output Section
Japanese Composite Clock (JCC) Other typical clock frequencies Setting Subtending Parameters The SSU-2000 software includes the following new command that allows you to enable and disable the Subtending mode. For additional information on general syntax and usage, refer to the SSU-2000 Technical Reference.
Page 276: Changing To Subtending Ssu Mode
Changing to Subtending SSU Mode To change an SSU-2000 to a Subtending SSU, you must verify that the proper hardware is present, and you must install the appropriate software. The minimum software versions for the modules is listed in Table 9-1.
Page 277: Required Hardware
To use the SynCraft application to install software, refer to the on-line documentation provided within the program. Changing From Subtending SSU Mode To change a Subtending SSU back to the normal mode: 12713020-002-2 Revision F.01 – January 2007 SSU-2000 User’s Guide 277...
Page 278: Ssu-2000 Configuration Chart
Chapter 9 Hardware Configuration Guide SSU-2000 Configuration Chart 1. Log in to the SSU-2000 and press Enter. The system prompt appears. 2. Type and press Enter. The system responds with: opermode normal 2002-08-15-T15:57:56Z ID: SSU2000 Name: SSU_2000 The SSU2000 is in Normal Mode 3.
Page 279: Ssu-2000 User's Guide
Expansion shelf (SDU-2000) is not installed, SSU Expansion Terminator, part number 12013049-000-0 must be installed on J8 on the SSU-2000 chassis. Otherwise, the terminator must be installed on the last Expansion shelf in the system. Bracket, rack ear, 19”...
Page 280 Chapter 9 Hardware Configuration Guide SSU-2000 Configuration Chart Table 9-3. SSU-2000 System Components (Continued) Item Description Part Number Notes Stratum 2E Rb Clock 23413016-000-0 Minimum of one Clock module per system Module (item 4, 5, or 6). Redundant configuration with automatic switching in case of clock failure requires two Clock modules.
Page 281 Chapter 9 Hardware Configuration Guide SSU-2000 Configuration Chart Table 9-3. SSU-2000 System Components (Continued) Item Description Part Number Notes GPS Input Module 23413019-000-0 1. Supports NTP provided by the Communications module. 2. Time-of-day provided by the Radio. CC Input Module 23413279-000-0 1.
Page 282 Chapter 9 Hardware Configuration Guide SSU-2000 Configuration Chart Table 9-3. SSU-2000 System Components (Continued) Item Description Part Number Notes 3-Port SSU I/O Input 22013066-003-0 1. Use with 3-port DS1 or E1 Input module. Adapter Panel 2. Each port has DE9 and Siemens 1.0/ 2.3 mm connectors (switch selectable)
Page 283 Chapter 9 Hardware Configuration Guide SSU-2000 Configuration Chart Table 9-3. SSU-2000 System Components (Continued) Item Description Part Number Notes 4-Port SSU I/O Adapter 22013069-003-0 1. One adapter panel serves up to four Panel 1-port Input modules. 2. Each port has DE9 and Siemens 1.0/ 2.3 mm connectors (switch selectable)
Page 284 Chapter 9 Hardware Configuration Guide SSU-2000 Configuration Chart Table 9-3. SSU-2000 System Components (Continued) Item Description Part Number Notes 2048 kHz Output 23413159-000-0 1. Minimum of one Output module of any Module type required. 2. Each Output module provides 20 single...
Page 285 Chapter 9 Hardware Configuration Guide SSU-2000 Configuration Chart Table 9-3. SSU-2000 System Components (Continued) Item Description Part Number Notes RS-422 Output Module 23413287-000-0 1. Minimum of one Output module of any type required. 2. Each Output module provides 10 balanced square-wave outputs (TTIP...
Page 286 Chapter 9 Hardware Configuration Guide SSU-2000 Configuration Chart Table 9-3. SSU-2000 System Components (Continued) Item Description Part Number Notes E1 Line Re-Timing 23413309-000-0 1. Minimum of one Output module of any Module type required. 2. The quad LRU provides retiming on four E1 lines to a Network Element.
Page 287 Chapter 9 Hardware Configuration Guide SSU-2000 Configuration Chart Table 9-3. SSU-2000 System Components (Continued) Item Description Part Number Notes I/O Cable, 50 pin 1 m 060-10003-10-2 1. One cable (1 to 2 meters in length) I/O Cable, 50 pin 1.1 m...
Page 288 Chapter 9 Hardware Configuration Guide SSU-2000 Configuration Chart Table 9-3. SSU-2000 System Components (Continued) Item Description Part Number Notes Buffer Module 23413122-000-0 1 or 2 required per SDU-2000 expansion shelf (install in slots A15 and A16). Blank Filler Panels Clock Module Filler...
Page 289: Index
SDU-2000 expansion shelf antenna calculating MTIE connectors, main shelf calculating TDEV slot connections architecture SSU-2000 cautions defined autoreturn Cesium fault autoswitch DS1 Input module E1 Input module changing mode checking current alarms 12713020-002-2 Revision F – October 2006 SSU-2000 User’s Guide 289...
Page 290 EIA-232 port critical alarm assignment overview connector pinout Cut-Through Assembly protocol installing electromagnetic interference considerations – overview pinout 290 SSU-2000 User’s Guide 12713020-002-2 Revision F – October 2006...
Page 291 Stratum 2E Clock module I/O adapter panels Stratum 3E Clock module I/O connections Type 1 Clock module preliminary procedures front panel, SDU-2000 procedure, overview fuse replacement warning tools and materials fuses, main shelf 12713020-002-2 Revision F – October 2006 SSU-2000 User’s Guide 291...
Page 292 Stratum 3E Clock module Japan CC Output troubleshooting Japan Sine Wave Input module troubleshooting with overview Type 1 Clock module power supplies local oscillator connectors redundant removing logic ground, isolating 292 SSU-2000 User’s Guide 12713020-002-2 Revision F – October 2006...
Page 293 BNO tee connector RMA. See return material authorization 12713020-002-2 Revision F – October 2006 SSU-2000 User’s Guide 293...
Page 294 CC Output module DS1 Line Re-timing module system reference, selecting E1 Line Re-timing module E1 Output module E1/2048 kHz Output module RS-422 Output module TDEV Stratum 2E Clock module calculation 294 SSU-2000 User’s Guide 12713020-002-2 Revision F – October 2006...
Page 295 Stratum 2E Clock module Type 1 Clock module Stratum 3E Clock module Type 1 Clock module block diagram warnings defined front panel specifications web address wire-wrap adapters wire-wrap adapters, input wire-wrap panel, high-density 12713020-002-2 Revision F – October 2006 SSU-2000 User’s Guide 295...
Page 296 Index W—W 296 SSU-2000 User’s Guide 12713020-002-2 Revision F – October 2006...

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Sdu-2000

Symmetricom SSU-2000 User Manual

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Table of Contents

Chapter 1 Product Overview

Chapter 2 Installing the SSU-2000

Chapter 3 Provisioning and Operating the SSU-2000

Chapter 4 Commissioning

Chapter 5 Maintenance and Troubleshooting

Chapter 6 Clock and Communications Module Reference Data

Chapter 7 Input Module Reference Data

Chapter 8 Output Module Reference Data

Chapter 9 Hardware Configuration Guide

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