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PairGain HIGAIN HRU-412 Manual

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H
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EMOTE
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Model
List Number Part Number
CLEI Code
HRU-412
9B
150-1103-92 T1L2CCTAAA
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ECHNOLOGIES
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NGINEERING
ERVICES
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RACTICE
™150-412-192-02Z¨
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150-412-192-02
ECTION

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Summary of Contents for PairGain HIGAIN HRU-412

  • Page 1 EMOTE Model List Number Part Number CLEI Code HRU-412 150-1103-92 T1L2CCTAAA ECHNOLOGIES NGINEERING ERVICES ECHNICAL RACTICE ™150-412-192-02Z¨ 150-412-192-02 ECTION...
  • Page 2 ©Copyright 1998 PairGain Technologies, Inc. PairGain and HiGain are registered trademarks of PairGain Technologies, Inc. Information contained in this document is company private to PairGain Technologies, Inc., and shall not be modified, used, copied, reproduced or disclosed in whole or in part without the written consent of PairGain.
  • Page 3 150-412-192-02, Revision 02 Using This Technical Practice SING ECHNICAL RACTICE Two types of messages, identified by icons, appear in the text. Notes contain information about special circumstances. Cautions indicate the possibility of equipment damage or the possibility of personal injury. HRU-412 List 9B November 18, 1998...
  • Page 4 Using This Technical Practice 150-412-192-02, Revision 02 November 18, 1998 HRU-412 List 9B...

  • Page 5: Table Of Contents

    150-412-192-02, Revision 02 Table of Contents ABLE OF ONTENTS Product Overview________________________________________ 1 Front Panel ................3 Card Edge Pin-Out Diagram ............ 7 Backplane User Options ............8 Sealing Current (SCURR) ......... 9 Interface-Customer Premises Equipment (I-CPE) ..9 Superframe Remote Alarm Indicator (SF-RAI) ..10 Receive Level (RLEV) ..........
  • Page 6 Table of Contents 150-412-192-02, Revision 02 Loopback Design Description ..........42 HRU Loopbacks............43 HLU Loopbacks............44 Loopback Test Procedures ........46 Special PM and Test Features _____________________________50 General PM Applications ............50 Summary of PM Features............51 Alarm Indicating Signal-Customer Interface (AIS-CI)..........51 Remote Alarm Indication-Customer Interface (RAI-CI) ..........51 SuperFrame Remote Indication Signal (SF-RAI)..52 Real-Time Reporting of PRM and SPRM ....52...
  • Page 7 150-412-192-02, Revision 02 Table of Contents Stored Sectionalized Events........... 64 Sectionalized Event Definitions ......64 Inband Retrieval of Stored Sectionalized Events ............... 65 ESF DL Retrieval of Stored Sectionalized Events ............... 65 Front Panel Access to Stored Sectionalized Events ............... 66 Clearing of Sectionalization and PM Data ....
  • Page 8 Table of Contents 150-412-192-02, Revision 02 Appendix A: Additional Information _______________________85 Functional Description ............85 Local and Line Powering .........86 Abbreviations .................88 Specifications .................90 Appendix B: Product Support _____________________________92 Warranty ..............93 Certification................93 UL Recognized...............94 CSA Certification ..............94 Standards Compliance............94 viii November 18, 1998 HRU-412 List 9B...
  • Page 9 150-412-192-02, Revision 02 List of Figures IST OF IGURES Figure 1. Typical HiGain System............1 Figure 2. Front Panel................3 Figure 3. HRU-412 Card Edge Pin-outs ..........7 Figure 4. Backplane User Option Locations .......... 8 Figure 5. HRU-412 Installed in a Remote Enclosure......13 Figure 6.
  • Page 10 List of Figures 150-412-192-02, Revision 02 Figure 27. Main Menu Screen ..............68 Figure 28. Current Status Screen ............69 Figure 29. Blockage Indicator History Screen........71 Figure 30. Sectionalized Event History Screen ........72 Figure 31. Performance 15-Minute History Screen......75 Figure 32. Performance 1-Day History Screen........77 Figure 33.
  • Page 11 150-412-192-02, Revision 02 List of Tables IST OF ABLES Table 1. Front Panel Components and Functions ........4 Table 2. Reading the Front Panel LEDs ..........5 Table 3. HDSL Loss Over Cables ............11 Table 4. Maintenance and Remote Terminal Menus ......19 Table 5.
  • Page 12 List of Tables 150-412-192-02, Revision 02 November 18, 1998 HRU-412 List 9B...

  • Page 13: Product Overview

    Product Overview RODUCT VERVIEW ® ® This technical practice describes the PairGain HiGain HRU-412 List 9B for doubler and non-doubler applications. The HRU functions as the remote end of a repeaterless T1 transmission system. When used with HiGain Line Units (HLUs) and HiGain Doubler Units (HDUs), the HiGain system provides 1.544 Mbps data transfer on two unconditioned copper pairs over...
  • Page 14 Transmission on each of 2 pairs • DS0 blocking • Compatible with PairGain 1 x 1 Protection Switching System The Transmit Loss of Signal Loopback (TLOS-LB) option in the HRU-412 List 8 has been replaced by the SF-RAI option. November 18, 1998...

  • Page 15: Front Panel

    150-412-192-02, Revision 02 Product Overview RONT ANEL Figure 2 Table 1 identify the HRU-412 front panel components. Table 2 describes how to read the different system status LEDs. Figure 2. Front Panel HRU-412 List 9B November 18, 1998...

  • Page 16: Table 1. Front Panel Components And Functions

    Product Overview 150-412-192-02, Revision 02 Table 1. Front Panel Components and Functions Name Function Test points 60 mA MON test points which allow the 60 mA CPE current option, if selected, to be measured. The current flowing is related to the voltage measured across the "+" and "-" test points by the following relationship: CPE current =1 mA / 1 mV.

  • Page 17: Table 2. Reading The Front Panel Leds

    150-412-192-02, Revision 02 Product Overview Table 2. Reading the Front Panel LEDs Name Mode Description ALM LEDs Remote and Local (LOC) Loss Of Signal (LOS). Remote (REM) Steady red LOS detected at the T1 input to the remote HLU unit. Loss of Signal This condition causes the HRU to transmit the AIS (LOS)
  • Page 18 Product Overview 150-412-192-02, Revision 02 Table 2. Reading the Front Panel LEDs (Cont.) Name Mode Description Displays HDSL Loop 1 and Loop 2 Conditions. HDSL LEDs OK Blinking HDSL Loop 1 is synchronizing with the HLU. green Steady HDSL Loop 1 is synchronized and ready to receive and green transmit data.

  • Page 19: Card Edge Pin-Out Diagram

    150-412-192-02, Revision 02 Product Overview IAGRAM The HRU-412 occupies one slot in a remote enclosure. The card edge pin-out diagram for the remote unit is shown in Figure Figure 3. HRU-412 Card Edge Pin-outs HRU-412 List 9B November 18, 1998...

  • Page 20: Backplane User Options

    Product Overview 150-412-192-02, Revision 02 ACKPLANE PTIONS The remote unit has four user options that must set before you install the unit into a shelf or enclosure. Three of these options are set by using manual switches and the fourth (sealing current) is set using jumper JP2 (Figure These options are located on the backplane of the unit.

  • Page 21: Sealing Current (Scurr)

    150-412-192-02, Revision 02 Product Overview Sealing Current (SCURR) The two-prong male JP2 jumper allows you to disable or enable the sealing current. The default is disable. To set the sealing current, do one of the following: • To enable the sealing current, connect JP2 across both terminals using the supplied female jumper block header.

  • Page 22: Superframe Remote Alarm Indicator (Sf-Rai)

    Product Overview 150-412-192-02, Revision 02 Superframe Remote Alarm Indicator (SF-RAI) The SF-RAI switch allows you to enable or disable the generation of an SF-RAI signal towards the CI in response to an ESF-RAI signs from the network. The default is disable. To set the SF-RAI, do one of the following: •...

  • Page 23: Applications

    150-412-192-02, Revision 02 Product Overview PPLICATIONS The HiGain system provides a cost-effective, easy-to-deploy method for delivering T1 service over two metallic pairs. Conventional in-line T1 repeaters are not required. Cable pair conditioning, pair separation and bridged tap removal are not required. General guidelines require that the loop has less than 35 dB of loss at 196 kHz, with 135Ω...

  • Page 24: Installation

    Support” on page 92 for more information). Your shipment should consist of: • One HRU-411 List 1 • PairGain Technologies HiGain Remote Unit 412 List 9B technical practice HELF OMPATABILITY The HRU-411 List 1 mounts in the following shelves (indoor use): •...

  • Page 25: Installing The Hru-412

    150-412-192-02, Revision 02 Installation HRU-412 NSTALLING THE The HRU-412 can be mounted into a PairGain HiGain Remote Enclosure (HRE) and in any industry standard 400 mechanics shelf. To install the remote unit (Figure Set the user options as described in the section “Backplane User...

  • Page 26: Connecting To A Terminal Emulator

    Installation 150-412-192-02, Revision 02 ONNECTING TO A ERMINAL MULATOR This section covers the terminal emulator or dumb terminal screens for both doubler and non-doubler applications. The front panel 9-pin Craft port (RS-232 DB-9 connector) allows you to use a RS-232 cable to connect your system to a dumb terminal or PC running a terminal emulation program.

  • Page 27: Figure 7. Connecting To A Terminal Emulator

    150-412-192-02, Revision 02 Installation Figure 7. Connecting to a Terminal Emulator Configure the dumb terminal to the following communication settings: • 1200 to 9600 baud (9600 baud is recommended) • Parity: None • 8 data bits • 1 stop bit •...

  • Page 28: Logging On And Using The Terminal Menus

    (Figure 8 shows the Main Menu of a local session). The Main Menu heading HiGain HRU-412 Maintenance Terminal Main Menu identifies the screen as a local log in session. However, after the remote unit and HLU establish synchronization, the port interface resets to a remote session.

  • Page 29: Figure 9. Remote Log In Menu Screen

    Craft port at other locations. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ RRRRRR EEEEEEE TTTTTTT EEEEEEE RRRRRR EEEEEE EEEEEE EEEEEEE EEEEEEE PAIRGAIN TECHNOLOGIES +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ HIT <ENTER> TO LOG IN or <TAB> FOR OTIS Figure 9. Remote Log in Menu Screen HRU-412 List 9B November 18, 1998...

  • Page 30: Figure 10. Main Menu Remote Log In Screen

    Installation 150-412-192-02, Revision 02 HI-GAIN HLU-231 REMOTE TERMINAL MAIN MENU (ver V6.0L-08) CIRCUIT ID#: A. VIEW SPAN STATUS C. SYSTEM SETTINGS D. LOOPBACK MODE: NONE E. VIEW PERFORMANCE DATA F. VIEW PERFORMANCE HISTORY G. VIEW ALARM HISTORY H. VIEW SYSTEM INVENTORY I.

  • Page 31: Maintenance Terminal Main Menu Descriptions

    150-412-192-02, Revision 02 Installation Maintenance Terminal Main Menu Descriptions Table 4 describes the function of each menu selection shown in Figure 8 Figure Table 4. Maintenance and Remote Terminal Menus Menu Function View Span Status Provides access to a submenu that allows “View Span Status”...

  • Page 32: Navigating The Hru Maintenance Menus

    Installation 150-412-192-02, Revision 02 Navigating the HRU Maintenance Menus Table 5 describes keys you can use on the dumb terminal’s keyboard to navigate within the Maintenance/Remote Terminal menus. Table 5. Dumb Terminal Navigational Keys Function Logs into the Remote Terminal menus Exits the current menu Updates a report Selects the next Span Status screen...

  • Page 33: Figure 11. View Span Status Screen For Non-Doubler Applications

    150-412-192-02, Revision 02 Installation Span Status Screen: Non-Doubler Applications From the Remote Terminal Main Menu, type . The Span Status screen displays (Figure 11). SPAN STATUS (HLU/ver6.0-0008:HRU/ver4.2-009B) TIME: 00:04:43 DATE: 02/11/98 ALARMS: NONE LOOPBACK: OFF HDSL-1 HDSL-2 HDSL-1 HDSL-2 cur/min/max cur/min/max cur/min/max cur/min/max MARGIN: 21/20/22 21/20/22...

  • Page 34: Figure 12. Two Doublers, Span 3 Screen

    Installation 150-412-192-02, Revision 02 Span Status Screen: Doubler Applications If doublers have been added, status is also reported for these. After pressing to access the Maintenance Terminal Main Menu, press to navigate through the span status screens. Span status can have from one to several screens, depending on the number of HDUs.

  • Page 35: Table 6. Span Status Fields And Descriptions

    150-412-192-02, Revision 02 Installation Span Status Fields Table 6 lists the Span Status fields and descriptions. Table 6. Span Status Fields and Descriptions Field Description Time Time of day when Span Status was checked. Date Date when Span Status was checked. Alarms Presence or absence of alarm conditions.

  • Page 36: Table 7. Alarm Field Messages And Descriptions

    Installation 150-412-192-02, Revision 02 Table 6. Span Status Fields and Descriptions (Cont.) Field Description Code type Type of DS1 line coding used (AMI, B8ZS, AMI: ZBTSI or B8ZS: ZBTSI). The latter two conditions indicate the code type that is being received when HiGain is set to its ZBTS mode.

  • Page 37: Table 8. Loopback Field Messages And Descriptions

    150-412-192-02, Revision 02 Installation Table 8. Loopback Field Messages and Descriptions Messages Full Name Description SMJK SmartJack Loopback at HRU towards network initiated by 2 Loopback in 5 in-band loopback code or out-of-band ESF data link code when SMJK is enabled. NREM Network Remote Loopback at HRU (remote) towards network...

  • Page 38: Set Clock

    Installation 150-412-192-02, Revision 02 Set Clock This option is available during local log in only (see Figure 13). From the local log in screen, press to display the Set Clock screen. SET CLOCK TIME: 00:04:53 DATE: 02/11/98 Format: HH:MM MM/DD/YY NEW TIME: 1212 NEW DATE: 01/01/98 Figure 13.

  • Page 39: System Settings

    150-412-192-02, Revision 02 Installation System Settings The System Settings screen allows you to analyze and view configurable parameters set at the HLU. These screens are for viewing only and cannot be altered. The system settings can only be set at the HLU. Type from either the Maintenance Terminal Main Menu or the Remote Terminal Main Menu to view the System Settings screen:...

  • Page 40: Table 9. System Settings Fields And Descriptions

    Installation 150-412-192-02, Revision 02 Table 9 lists the System Setting fields and descriptions. Table 9. System Settings Fields and Descriptions Field Description Time Time of day when System Settings were checked. Date Date when System Settings were checked. Equalization Indicates settings for equalizer of either EX1, 0 (DSX-1 for 0-133 ft), 133 (DSX-1 for 133-266 ft), 266 (DSX-1 for 266-399 ft), 399 (DSX-1 399-533 ft), 533 DSX-1 for 533-655 ft).
  • Page 41 150-412-192-02, Revision 02 Installation Table 9. System Settings Fields and Descriptions (Cont.) Field Description Margin Alarm Indicates the settings for the margin alarm thresholds. (ALM) Threshold (THRES) Remote (DS1 Indicates whether a LOS (Loss of Signal) at the HRU DS1 input will LOS) Alarm (RDA) generate an AIS and Alarm or LOS and no Alarm condition at the HLU.

  • Page 42: View Performance Data

    Installation 150-412-192-02, Revision 02 View Performance Data The View Performance Data screen shows the number of Error Seconds (ES) and Unavailable Seconds (UAS) occurrences in 15-minute increments for a 24-hour period. The presentation format is: Errored Seconds/Unavailable Seconds (ES/UAS) for the HLU and the HRU-406 List 1 for the DS1 signal, HDSL Loop 1 and HDSL Loop 2 (non-doubler applications).

  • Page 43: Figure 16. Two Doublers, Span 3 Performance Data

    150-412-192-02, Revision 02 Installation You can do the following: • Press to view the previous screen. • Press to view the next screen. • Press to exit. Doubler Applications HDU 1 (one doubler) and HDU2 (two doublers) appear in the Span Status screen for doubler applications.

  • Page 44: View Performance History

    Installation 150-412-192-02, Revision 02 The presentation format is: ES/UAS for the HLU and the remote unit’s DS1 signal, and ES/UAS for the HDU2 and remote unit over both HDSL Loop 1 and HDSL Loop 2. You can do the following: •...

  • Page 45: Figure 17. Performance History Screen (Non-Doubler)

    150-412-192-02, Revision 02 Installation Non-Doubler Applications Press from the Maintenance Terminal Main menu to open the Performance History screen for non-doubler applications. 7 DAY HISTORY ERRORED SECONDS/UNAVAILABLE SECONDS HDSL-1 HDSL-2 12/25 00000/00000 00000/00000 00000/00000 00000/00000 00000/00000 00000/00000 12/26 00000/00000 00000/00000 00000/00000 00000/00000 00000/00000 00000/00000 12/27 00000/00000 00000/00000 00000/00000 00000/00000 00000/00000 00000/00000 12/28...

  • Page 46: Figure 18. Two Doublers, Span 3 Performance Data Screen

    Installation 150-412-192-02, Revision 02 Two Doublers, Span 3 Performance Data Press again to view the Span 3 Performance Data screens (two doublers): Date: 03/06/98 SPAN 3 PERFORMANCE DATA CIRCUIT ID#: ERRORED SECONDS/UNAVAILABLE SECONDS HDSL-1 HDSL-2 HDU2 HDU2 21:15 000/000 000/000 000/000 000/000 000/000 000/000 21:30 000/000 000/000 000/000 000/000 000/000 000/000 21:45...

  • Page 47: View Alarm History

    150-412-192-02, Revision 02 Installation View Alarm History The View Alarm History screen allows you to view alarms that are currently active. Non-Doubler Applications Press from the Maintenance Terminal Main menu to view the Alarm History screen for non-doubler applications: ALARM HISTORY TIME: 00:17:18 DATE: 02/02/98 CIRCUIT ID#:...

  • Page 48: Table 10. Alarm History Fields And Descriptions

    Installation 150-412-192-02, Revision 02 Table 10 lists the Alarm History fields and descriptions. These descriptions apply to the Alarm History for doubler applications as well. Table 10. Alarm History Fields and Descriptions Field Description Type Identifies the type of alarm LOS, DS1-HLU First and last instance of LOS at the HLU;...

  • Page 49: Figure 20. Two Doublers, Span 3 Alarm History

    150-412-192-02, Revision 02 Installation You can do the following • Press to update the screen. • Press to view another span. • Press to exit from the Alarm History screen. Doubler Applications Depending upon the doubler configuration, Spans 1, 2 and 3 appear in the Alarm History screen using similar fields as shown in Table 11.

  • Page 50: Inventory Screen

    Installation 150-412-192-02, Revision 02 You can do the following: • Press to update the screen. • Press to view another span. • Press to exit from the Alarm History screen. Inventory Screen Press to select the System Inventory screen. It lists each circuit module by model and version number.

  • Page 51: Loopback Menu

    150-412-192-02, Revision 02 Installation Loopback Menu The Loopback Menu permits you to issue loopbacks to the HiGain system. There are five possible Loopback Menus: • Loopback Menu: No doubler • Loopback Menu: One doubler • Loopback Menu: Two doublers • Loopback Menu: Three doublers •...

  • Page 52: Figure 23. Loopback Menu With Four Doublers

    Installation 150-412-192-02, Revision 02 Loopback Menu: Four Doublers Figure 23 shows the Loopback Menu with four doublers. LOOPBACK MENU TIME: 00:03:33 DATE: 02/02/98 CIRCUIT ID#: A. DISABLE LOOPBACKS B. NETWORK LOOP HLU (NLOC) M. NETWORK LOOP DOUBLER 4 (NDU4) C. NETWORK LOOP HRU (NREM) N.

  • Page 53: Remote Logoff

    150-412-192-02, Revision 02 Installation Disable Loopbacks The Disable Loopbacks option allows you to disable (cancel) any of the loopbacks listed in the screen. To disable loopbacks, press in the Loopback Menu. The following prompt appears: PLEASE WAIT....A series of dots moves from left to right indicating that the command has been issued.

  • Page 54: Loopback Design Description

    Installation 150-412-192-02, Revision 02 OOPBACK ESIGN ESCRIPTION Loopbacks permit you to perform a isolated diagnostic tests on specific areas of the circuit. The transmitted signal is returned to the sending device after passing through a data communications link or network. This allows you to compare the returned signal with the transmitted signal and to determine if there is a problem with the circuit.

  • Page 55: Hru Loopbacks

    150-412-192-02, Revision 02 Installation Figure 24. HiGain System Loopbacks HRU Loopbacks The HRU loopbacks are: • Network Remote (NREM): The DSX-1 signal is looped back to the DSX-1 at the remote unit. • TLOS: The DSX-1 signal is logically looped back to the DSX-1 at the remote unit when the Remote’s DS1 input signal is lost.

  • Page 56: Hlu Loopbacks

    Installation 150-412-192-02, Revision 02 HLU Loopbacks The HLU loopbacks are: • Network Local Loopback (NLOC): The DSX-1 signal is looped back to the DSX-1 at the HLU. • Customer Remote Loopback (CREM): Signal from the customer is looped back to the customer at the HRU. The SmartJack loopback shown in Figure 24 are the standard NID metallic...
  • Page 57 150-412-192-02, Revision 02 Installation When the remote unit is in its AIS/ENA SmartJack metallic loop back state, its T1 input LOS, Code and Frame monitoring circuits are connected to the unframed AIS pattern which is being looped back to these circuits through the loopback relay.

  • Page 58: Loopback Test Procedures

    Installation 150-412-192-02, Revision 02 Loopback Test Procedures Testing of your HiGain system allows you to verify the integrity of the HDSL channels to the HLU as well as the DS1 channels to the customer and the HLU DSX-1 interface. While the HRU-412 displays system condition messages at the Remote and Maintenance Terminals, and via color-coded LED displays on the front panel, the HLU displays system conditions via four-character LCD messages.
  • Page 59 150-412-192-02, Revision 02 Installation If the sealing current option is enabled (JP2 connected), insert a milliampmeter in service with the Tip or Ring of either HDSL pair and verify that at least 20 mA of sealing current is flowing. When T1 loopback tests are made using external metallic loopback connections at either end, the DS1 code at the metallic loopback interface may be different from the DS1 code being received at the opposite end when the DS1 user...

  • Page 60: Table 11. Hlu Front Panel Display Messages

    Installation 150-412-192-02, Revision 02 Table 11 lists and describes the messages seen on the front panel display of the HLU that is connected to the remote unit. Table 11. HLU Front Panel Display Messages Message Name Description CREM Customer Remote Signal from customer is looped back to Loopback customer at the HLU.
  • Page 61 150-412-192-02, Revision 02 Installation Table 11. HLU Front Panel Display Messages (Cont.) Message Name Description PWR FEED Power Feed Open Indicates an open circuit in the Tip and OPEN Ring of either HDSL pair. PWR FEED Power Feed Off HDSL span power has been turned off by setting the PWFD option to DIS.

  • Page 62: Special Pm And Test Features

    • Loopback toward the network with AIS insertion to the CPE equipment When adding another PairGain or ADA remote unit at the far-end of the DS1 circuit or with the inclusion of a T3AS or other equivalent performance monitoring system in the data path, the remote unit provides all of the benefits...

  • Page 63: Summary Of Pm Features

    150-412-192-02, Revision 02 Special PM and Test Features • Adaptive frame format conversion – SF to ANSI T1.403 ESF – Non-standard to standard ANSI T1.403 ESF (i.e. addition of remote units) – AT&T PUB 54016 to ANSI T1.403 ESF (i.e. addition of remote units without interference with the 54016 poll response) •...

  • Page 64: Superframe Remote Indication Signal (Sf-Rai)

    Special PM and Test Features 150-412-192-02, Revision 02 SuperFrame Remote Indication Signal (SF-RAI) This is a new SF-RAI user option that is set by a switch located on the remote unit’s printed circuit board. It causes a network ESF RAI/Yellow Alarm signal detected in the FDL to be converted into an SF-RAI formatted signal (bit 2 = 0 in all time slots) towards the CI when the CI DS1 payload is in the SF frame format mode.

  • Page 65: On Demand Reporting Of Performance Data

    150-412-192-02, Revision 02 Special PM and Test Features On Demand Reporting of Performance Data The remote unit stores errors and alarms as Sectionalized Events (SEs) and Performance Primitives (PPs), then calculates a Blockage Indicator (BI) parameter. SEs isolate error and alarm conditions to the circuit leg with time of occurrence.

  • Page 66: Alarm Indication Signal-Customer Interface

    Special PM and Test Features 150-412-192-02, Revision 02 LARM NDICATION IGNAL USTOMER NTERFACE The Alarm Indication Signal-Customer Interface (AIS-CI) is a variation of the ANSI T1.403 AIS signal (unframed all ones), and is intended to specifically indicate a loss of signal from the customer installation. AIS-CI meets the T1.403 requirements for AIS so that equipment which does not support detection of AIS-CI will still detect AIS.

  • Page 67: Superframe-Remote Alarm Indicator

    150-412-192-02, Revision 02 Special PM and Test Features The RAI CI is only transmitted if the following conditions exist: • The RAI -Yellow Alarm is being received from the CI in either the SF or ESF frame format • The T1 payload being received is error free. •...

  • Page 68: Sf To Esf Frame Format Conversion

    Special PM and Test Features 150-412-192-02, Revision 02 SF to ESF Frame Format Conversion The remote unit, in conjunction with a similar HRU-412 List 9B remote unit or an ADA remote unit connected at the far end of the circuit, performs frame format conversion.

  • Page 69: Performance Report Messages

    150-412-192-02, Revision 02 Special PM and Test Features Performance Report Messages ANSI T1.403 PRM are 13-byte message-oriented signals sent once per second in the ESF DL and provide an indication of the quality of the signal from the network at the network interface. If the signal from the CPE does not contain PRM, as in Modes 1, 2 and 3 in Table 12, then the remote unit generates PRM and inserts them into the FDL...

  • Page 70: Supplemental Performance Report Messages

    Special PM and Test Features 150-412-192-02, Revision 02 PRM generation by the remote unit does not interfere with AT&T Pub 54016 poll and response messages generated by the CPE in Mode 3. Commonly available network elements and test equipment are capable of reading PRM and providing both real-time and historical performance information.

  • Page 71: Mode Analysis And Sf/Esf Conversion

    150-412-192-02, Revision 02 Special PM and Test Features Table 13. R-Bit Patterns R-bit Pattern Description 11111111 The HRU-412 is generating PRM 10001000 The HRU-412 is passing through PRM at the CI 10101010 An HRU-412 hardware fault has been detected 00000000 No HRU-412 List 9B or equivalent ADA Remote model is installed or the PRM and SPRM generating functions are disabled.
  • Page 72 Special PM and Test Features 150-412-192-02, Revision 02 Mode 2: CPE = ESF without PRM: Network = ESF ANSI The remote unit’s response is the same as in Mode 1 except that CRC-6 monitoring is now available and is used by the U2 bit to measure the integrity of the CPE signal.

  • Page 73: Table 14. Mode 1, 2 And 3 Fault Analysis

    150-412-192-02, Revision 02 Special PM and Test Features Table 14. Mode 1, 2 and 3 Fault Analysis Error Indicating Parameter Fault Location Locally Remotely Generated Generated (Near End, (Far End) HRU) PRM4 PRM1 NET - Leg 1 CPE - Leg 3 GOOD NET - Leg 4 CPE - Leg 3 and...

  • Page 74: On Demand Reporting Of Performance Data

    Special PM and Test Features 150-412-192-02, Revision 02 EMAND EPORTING OF ERFORMANCE In applications where real time performance monitoring is not available, the remote unit provides remote, on-demand access to stored PM information. The primary data stored by the remote unit are Sectionalized Events (alarms and payload errors).

  • Page 75: Monitored Events

    150-412-192-02, Revision 02 Special PM and Test Features Monitored Events The alarms and failures which can be monitored by the remote unit depend on the frame formats of the signals from the network and from the CPE. Failures and errors are recorded directly by observation of the signals from the CPE.

  • Page 76: Stored Sectionalized Events

    Special PM and Test Features 150-412-192-02, Revision 02 TORED ECTIONALIZED VENTS Following are definitions of sectionalized events along with access, retrieval and clearing information. Sectionalized Event Definitions The information described in Table 17 is collected by the remote unit and is used to tally the alarm and error events for all four legs as listed in the following table.

  • Page 77: Inband Retrieval Of Stored Sectionalized Events

    150-412-192-02, Revision 02 Special PM and Test Features Alarms and error events are recorded at the times of their occurrences and are stored along with relative time stamps. Up to 100 individual occurrences are stored by the remote unit. Inband Retrieval of Stored Sectionalized Events Inband retrieval of stored sectionalized events is intrusive and requires the interruption of traffic on the DS1 path.

  • Page 78: Front Panel Access To Stored Sectionalized Events

    Special PM and Test Features 150-412-192-02, Revision 02 Front Panel Access to Stored Sectionalized Events The remote unit provides nonintrusive local access to the stored PM data and sectionalized events via the front panel access. Any VT-100 terminal emulator can connect to the remote unit via a 9-Pin D-Sub connector. Once connected, the remote unit will auto-baud and presents to the user the HRU main menu shown in Figure...

  • Page 79: Performance Data Screen Displays

    150-412-192-02, Revision 02 Special PM and Test Features ERFORMANCE CREEN ISPLAYS The ADA subsystem screens can be selected from selection H of the main menu (Figure 8), for local log-in sessions. It is selected by tab key of the Remote Log-in screen shown in Figure The header of each screen displays the title of the screen, the date, the time, the circuit identification, current values of various remote unit Options, and a...

  • Page 80: Main Menu Screen

    Special PM and Test Features 150-412-192-02, Revision 02 Main Menu Screen Following the initial pass through the Set Clock screen, the Main menu is displayed. The user may then select the following functions from the menu: AAAA DDDDD AAAA AAAAAA AAAAAA DDDDD Inc.

  • Page 81: Current Status Screen

    150-412-192-02, Revision 02 Special PM and Test Features Current Status Screen The screen is displayed by pressing in the Main Menu. Current Status Remote Module Model PRGAIN Circuit ID: ** ID not defined ** Date: 02/27/98 Time: 09:47:05 Conversion:Auto LBTO: Frame:ESF Line Code: AMI NET Frame:ESF...

  • Page 82: Table 18. Status Screen Parameters

    Special PM and Test Features 150-412-192-02, Revision 02 Table 18. Status Screen Parameters Abbreviation Parameter On Screen Errored Seconds Severely Errored Seconds Unavailable Seconds Monitored Seconds Line Code Violations CV-L Blockage Indicator ES, SES, UAS and CV-L parameters are as defined in Section 6 in ANSI T1-231-1997.

  • Page 83: Blockage Indicator History Screen

    150-412-192-02, Revision 02 Special PM and Test Features Blockage Indicator History Screen This screen is displayed by pressing in the Main Menu. Blockage Indicator History Remote Module Model PRGAIN Circuit ID: ** ID not defined ** Date: 02/27/98 Time: 09:48:51 >...

  • Page 84: Sectionalized Event History Screen

    Special PM and Test Features 150-412-192-02, Revision 02 Sectionalized Event History Screen This screen is displayed by pressing in the Main Menu. Sectionalized Event History Remote Module Model PRGAIN Circuit ID: ** ID not defined ** Date: 02/27/98 Time: 09:50:30 >...

  • Page 85: Table 19. Screen Section Descriptions

    150-412-192-02, Revision 02 Special PM and Test Features Table 19. Screen Section Descriptions Screen Section Events Press Press 01-10 Section 2 Not Available 11-20 Section 3 Section 1 21-30 Section 4 Section 2 31-40 Section 5 Section 3 41-50 Section 6 Section 4 51-60 Section 7...

  • Page 86: Table 20. Sectionalized Event Descriptions

    Special PM and Test Features 150-412-192-02, Revision 02 Table 20. Sectionalized Event Descriptions Screen Section Events Signal is clean Errored Seconds condition Severely Errored Seconds condition IDLE DS1 Idle signal ALARM LOS or OOF condition AIS condition RAI condition NOT SECT No Sectionalized Data Available Sectionalized events isolate troubles to a particular circuit leg.

  • Page 87: Performance 15-Minute History Screen

    150-412-192-02, Revision 02 Special PM and Test Features Performance 15-Minute History Screen This screen is displayed by pressing in the Main menu. Performance 15-Min History Remote Module Model PRGAIN 3.5 Circuit ID: ** ID not defined ** Date: 02/27/98 Time: 09:54:10 >...

  • Page 88: Table 21. Performance 15-Minute History Screen Descriptions

    Special PM and Test Features 150-412-192-02, Revision 02 Table 21. Performance 15-Minute History Screen Descriptions Screen Section 15-Minute Periods Press Press 01-8 Section 2 Not Available 09-16 Section 3 Section 1 17-24 Section 4 Section 2 25-32 Section 5 Section 3 33-40 Section 6 Section 4...

  • Page 89: Performance 1-Day History Screen

    150-412-192-02, Revision 02 Special PM and Test Features Performance 1-Day History Screen The screen is displayed by pressing in the Main menu. Performance 1-Day History Remote Module Model PRGAIN 3.5 Circuit ID: ** ID not defined ** Date: 02/27/98 Time: 09:52:44 >...

  • Page 90: Table 22. Performance 1-Day History Screen Descriptions

    Special PM and Test Features 150-412-192-02, Revision 02 Table 22. Performance 1-Day History Screen Descriptions Screen Section 15-Minute Periods Press Press 01-8 Section 2 Not Available 09-16 Section 3 Section 1 17-24 Section 4 Section 2 25-32 Section 5 Section 3 33-40 Section 6 Section 4...

  • Page 91: Set Date/Time Screen

    150-412-192-02, Revision 02 Special PM and Test Features Set Date/Time Screen When craft port begins or is reset, execution always starts with this screen and then proceeds automatically to the Main Menu. The user may call this screen from the Main Menu by pressing .

  • Page 92: Signal Generator Screen

    Special PM and Test Features 150-412-192-02, Revision 02 This ADA Set Date/Time functions and the HRU Set Clock function discussed in the HRU Craft port section each contain separate and independent time and date clocks. Setting the parameters and menu on one has no effect on those set from the other menu.

  • Page 93: Figure 35. Update Screen

    150-412-192-02, Revision 02 Special PM and Test Features Table 23. Signal Generator Screen Descriptions Signal Description Normal Normal transmission: DS1 path intact SF All Ones SF framed signal with all ones payload ESF All Ones ESF framed signal with all ones payload If either the SF All Ones or ESF 0l Ones mode is selected, the key followed by the...

  • Page 94: Provisioning Settings

    Special PM and Test Features 150-412-192-02, Revision 02 Provisioning Settings This screen is displayed by pressing in the Main Menu. Table 24 lists the screen options available. Provisioning Setting Menu Remote Module Model PRGAIN Circuit ID: ** ID not defined ** Date: 02/27/98 Time: 09:57:04 Frame Format (A)uto Conversion:...

  • Page 95: Frame Format Auto Conversion

    150-412-192-02, Revision 02 Special PM and Test Features Frame Format Auto Conversion This option allows user to enable/disable SF to ESF frame format conversion at the network interface. In “Auto”-adaptive mode, the remote unit passes ESF through or convert SF to ESF if it detects ESF coming from the network.

  • Page 96: Reset Provisioning Option To Default Settings

    Special PM and Test Features 150-412-192-02, Revision 02 Reset Provisioning Option to Default Settings This option restores all provisioning options, including Circuit ID, to the factory default settings above. When the user presses to update the settings, a query displays which allows the user to confirm or discard the changes made from this screen.

  • Page 97: Appendix A: Additional Information

    150-412-192-02, Revision 02 Appendix A: Additional Information A: A PPENDIX DDITIONAL NFORMATION Appendix A contains technical information about the HRU-412 List 9B. UNCTIONAL ESCRIPTION HiGain utilizes 2B1Q HDSL transceiver systems to establish two full-duplex 784 kbps data channels between the HLU and a remotely-mounted remote unit.

  • Page 98: Local And Line Powering

    Appendix A: Additional Information 150-412-192-02, Revision 02 The remote unit power supply converts the 90 to 130 Vdc power feed that is received on the simplex pairs (or the -48V input when locally powered) to voltages and currents required by the remote unit circuitry. The power supply generates +5, -5 and 30 Vdc outputs.
  • Page 99 150-412-192-02, Revision 02 Appendix A: Additional Information used with the remote unit to provide a path through which the simplexed sealing current can flow. If local power is lost to the remote unit in a non-doubler or a single doubler circuit, the system loses synchronization.

  • Page 100: Abbreviations

    Appendix A: Additional Information 150-412-192-02, Revision 02 BBREVIATIONS 2–Bits–1–Quaternary 2B1Q Applied Digital Access Alarm Indication Signal AIS-CI Alarm Indication Signal-Customer Interface Alternate Mark Inversion B8ZS Binary 8 zeroes Suppression Bipolar Violation Customer Interface Central Office Customer Local Loopback CLOC Customer Premises Equipment Cyclic Redundancy Check.
  • Page 101 150-412-192-02, Revision 02 Appendix A: Additional Information HiGain Doubler Unit HiGain Line Unit HiGain Remote Enclosure HiGain Remote Unit I-CPE Interface-Customer Premises Equipment Loss of Signal LOSW Loss of Sync Word Monitors time in seconds Network Equipment Building System NEBS Network Interface Network Interface Device Network Interface Unit...

  • Page 102: Specifications

    Appendix A: Additional Information 150-412-192-02, Revision 02 PECIFICATIONS Physical Material Steel Finish Zinc plated Mounting Any standard 400 mechanics shelf Dimensions Height 5.6 in. (14.22 cm) Width 1.4 in. (3.55 cm) Depth 5.6 in. (14.22 cm) Weight 1 lb., 2 oz. Power Consumption 6W (with I-CPE set to 0)
  • Page 103 150-412-192-02, Revision 02 Appendix A: Additional Information 100 Ω Line Impedance Pulse Output 0 dB (RLEV = 0), -15 dB (RLEV = 15) Input Level >Input level sensitivity >-35 dB Line Rate 1.544 Mbps ± 200 bps Output Wander (MTIE <1.5 U>I>...

  • Page 104: Appendix B: Product Support

    Appendix B: Product Support 150-412-192-02, Revision 02 B: P PPENDIX RODUCT UPPORT PairGain Technical Assistance is available 24 hours a day, 7 days a week by contacting PairGain Customer Service Engineering group at: (800) 638-0031 or (714) 832-9922 Telephone: (714) 832-9924 Fax:...

  • Page 105: Warranty

    Do not try to repair the unit. If it fails, replace it with another unit and return the faulty unit to PairGain for repair. Any modifications of the unit by anyone other than an authorized PairGain representative voids the warranty.

  • Page 106: Ul Recognized

    Appendix B: Product Support 150-412-192-02, Revision 02 UL R ECOGNIZED The HRU-412 List 9B is a UL Recognized component. Use normal caution when installing or modifying telephone lines. Dangerous voltages may be present. It is also considered imprudent to install telephone wiring during a lightning storm.
  • Page 108 Corporate Office 14402 Franklin Avenue Tustin, CA 92780 Tel: (714) 832-9922 Fax: (714) 832-9924 For Technical Assistance: (800) 638-0031...

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