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Metrodata ATM CBR DSU User Manual

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ATM CBR DSU
Metrodata ATM CBR (Circuit Emulation)
DSU User Manual
Metrodata Ltd
Fortune House
Crabtree Office Village
Eversley Way
Egham
Surrey TW20 8RY
United Kingdom
tel: +44 (0) 1784 744700
fax:+44 (0) 1784 744730
email: support@metrodata.co.uk
Part No: 76-02-031E
website: www.metrodata.co.uk

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  • Page 1 ATM CBR DSU Metrodata ATM CBR (Circuit Emulation) DSU User Manual Metrodata Ltd Fortune House Crabtree Office Village Eversley Way Egham Surrey TW20 8RY United Kingdom tel: +44 (0) 1784 744700 fax:+44 (0) 1784 744730 email: support@metrodata.co.uk Part No: 76-02-031E...
  • Page 3 Further, Metrodata Ltd reserves the right to revise this publication and to make changes from time to time in the content hereof without obligation of Metrodata Ltd to notify any person of such revision or changes.

  • Page 5: Table Of Contents

    CONTENTS INTRODUCTION 1. 1 About the ATM CBR DSU Family 1. 2 ATM CBR DSU Typical Installation 1. 3 About this manual 1. 4 Conventions STATUTORY INFORMATION 2. 1 Safety Electromagnetic Compatibility 2. 3 EN55022 Declaration 2. 4 FCC Declaration 2.
  • Page 6 Event logs 5 . 8. 1 Config event log 5 . 8. 2 Performance data 5. 9 ATM CBR DSU checklist for configuring DSUs ANALYSING PERFORMANCE 6. 1 Layer definitions 6. 2 Physical Layer Errors and Alarms 6 . 2. 1 Physical Layer Error &...
  • Page 7 10 E2 CBR PORT CONFIGURATION 10. 1 E2 Physical Interface 10. 2 E2 Physical Layer Framing 10. 3 E2 WAN Set-up 10 . 3. 1 Framing 10 . 3. 2 Line Coding 10 . 3. 3 Timing 10 . 3. 4 AIS Detection 10.
  • Page 8 13. 9 E3 Physical layer error types 13. 10 E3 Physical layer alarms 13. 11 E3 Alarm responses 14 DS3 UNI PORT CONFIGURATION 14. 1 DS3 Physical interface 14. 2 DS3 Framing 14. 3 DS3 PLCP layer 14. 4 DS3 ATM layer 14.
  • Page 9 17 SPECIFICATIONS 17. 1 CBR Ports 17. 2 ATM UNI Ports 17. 3 General Specifications 17. 4 ATM CBR DSU default settings 18 GLOSSARY...

  • Page 11: Introduction

    1 INTRODUCTION 1. 1 About the ATM CBR DSU Family The ATM CBR DSU products are also known as Circuit Emulation (ATMCE DSUs), but the term CBR is retained in this manual to correspond with the product menus. ATM CBR DSUs are used to connect equipment which operates at constant bit rates (CBR), such as PABXs and Video Codecs, across ATM networks.
  • Page 12 INTRODUCTION Metrodata ATM CBR DSUs also provide extensive performance monitoring facilities. They can monitor degraded line performance and traffic density and have extended alarm processing on the connection, giving the network manager visibility and control of the wide- area link.

  • Page 13: Atm Cbr Dsu Typical Installation

    INTRODUCTION 1. 2 ATM CBR DSU Typical Installation The DSUs are installed in-circuit as shown in the Figure below: PABX / VIDEO CODEC E1 CBR LINK LINE PORT ATM CBR DSU ATM UNI PORT E3 ATM LINK ATM NETWORK DS3 ATM LINK...

  • Page 14: About This Manual

    Sections 9 to 12 describe each of the Circuit Emulation (CBR) interfaces available for the ATM CBR DSU family of products. Sections 13 to 16 inclusive describe the UNI (or WAN) interfaces. Finally, Section 17 lists the various Specifications of the DSU interfaces. The data in this section may be needed to set-up the ATM CBR DSU.

  • Page 15: Conventions

    INTRODUCTION 1. 4 Conventions Notes are used to provide the reader with either statutory information which must be observed for safety reasons, or additional information which may increase the DSUs effectiveness. A pair of arrows around a word indicates a key on the keyboard, such as <space> or <escape>.
  • Page 16 INTRODUCTION 76-02-031E...

  • Page 17: Statutory Information

    EMC compliance. 2. 3 EN55022 Declaration The ATM CBR DSU is a Class A product. In a domestic environment it may cause radio interference in which case the user may be required to take adequate measures.

  • Page 18: Power Supply

    STATUTORY INFORMATION 2. 5 Power Supply The ATM CBR DSU is powered by a mains supply with an input voltage of 100-250VAC 50- 400Hz and with an input current of 50 mA. The unit is provided ex-factory with a 250mA internal fuse.

  • Page 19: Laser Technology

    STATUTORY INFORMATION 2. 7 Laser Technology The user is reminded that some models of the ATM CBR DSU family employ laser technology. Care must be taken not to expose the eyes to laser beams or radiation since tissue damage to the eyes can result. DSUs that use laser technology are the SDH/Sonet models.
  • Page 20 STATUTORY INFORMATION 76-02-031E...

  • Page 21: Introducing The Atm Cbr Dsu

    INTRODUCING THE ATM CBR DSU 3 INTRODUCING THE ATM CBR DSU The ATM CBR DSU family is used to interface between equipment with CBR ports implemented as E1, E2, E3, or DS3, and ATM networks supporting E3, DS3, TAXI, or SDH/Sonet UNI interfaces.

  • Page 22: Rear Panels

    INTRODUCING THE ATM CBR DSU 3. 3 Rear panels Example rear panel layouts are shown below. They are not to scale. Metrodata Ltd ATM E3-OC3 CBR DSU MM STM1/OC3 100-250VAC/50-400Hz TERMINAL ALARM EXT HAZARD WARNING! PORT DO NOT OPEN WITH POWER CONNECTED Figure 3.3 DSU Rear panel 240 VAC supply...

  • Page 23: Remote Management Port

    INTRODUCING THE ATM CBR DSU 3. 5 Remote Management Port This port is labelled MAN PORT on the rear panel. The LM1100 SNMP Enabler option gives access to the SNMP network management system via an IEEE 802.3/10BaseT interface on the rear of the DSU. The Management port is regarded as a SELV port within the scope of EN41003.

  • Page 24: Terminal Port

    INTRODUCING THE ATM CBR DSU Function Shield Major common Minor N/O Minor N/C Not connected Major N/C Major N/O Minor common Not connected Figure 3.8 9-pin D-type connector layout 3. 7 Terminal port This port is labelled TERMINAL on the rear panel. The management terminal is connected to the female 25 pin D-type connector.

  • Page 25: Terminal Cable 25 Way To 25 Way

    INTRODUCING THE ATM CBR DSU 3 . 7. 1 V.24 Terminal cable 25 way to 25 way A full RS232 connection via a 25-way cable is shown below: 25 Way D Male Function 25 Way D Female (DSU) (Terminal) Transmit...

  • Page 26: Connecting To A Pc Com Port

    INTRODUCING THE ATM CBR DSU The default settings for the terminal connected to the management port are given in the table below: Item Default Terminal type Baud rate 9600 Parity None Data bits Stop bits Modem support Figure 3.12 Terminal port default settings 3 .

  • Page 27: Atm Uni Port (Fibre)

    INTRODUCING THE ATM CBR DSU 3. 8 ATM UNI Port (Fibre) The connection is made to the ST, SC or FC/PC connectors mounted on the DSU rear panel. As you face the rear panel, there are two pairs of connectors mounted on the right hand side of the panel.

  • Page 28: Cbr Line Network Port (Bnc)

    INTRODUCING THE ATM CBR DSU 3. 10 CBR LINE Network Port (BNC) The connection is made to the BNC connectors mounted on the DSU rear panel. As you face the rear panel, there are two pairs of connectors mounted on the right hand side of the panel.

  • Page 29: Installing & Setting-Up

    INSTALLING & SETTING-UP 4 INSTALLING & SETTING-UP This Section describes how to set up the ATM CBR DSU ready for use. It covers the initial connections, powering on the DSU, and how to access, set and change the operating parameters.

  • Page 30: Power-Up Sequence

    In order to check or change any of the operating parameters, you will first need to gain access to the DSUs software by logging on. The logon message is displayed at the bottom of the screen. Metrodata ATM5300: Local connection to “[nodename]" password ('view' to view only): Figure 4.2 Logon screen There are two levels of user - Observer, or Operator.

  • Page 31: Tty Terminal

    INSTALLING & SETTING-UP 4 . 3. 1 TTY terminal With a TTY terminal, options are selected by pressing the first capital letter in the name. Generally, this will be the first letter, but where two menu options start with the same letter one of them will have another letter capitalised.

  • Page 32: Vt100/Vt220 And Ansi Terminals

    INSTALLING & SETTING-UP 4. 4 VT100/VT220 and ANSI terminals The displays you see on a VT100/VT220 or an ANSI terminal (or a PC with a terminal emulator) are very similar, but have improved graphics and examples are shown below: MAIN SET-UP alarm eXtension <menu>...

  • Page 33: Default Settings

    INSTALLING & SETTING-UP 4. 5 Default settings The management terminal behaves in the same way for all ATM CBR DSU models. The default settings for the terminal connected to the management port are given in the table below. The terminal must be set to the DSUs default values before performing a cold start. Once this is done, the DSUs V.24 settings can be changed using the V.24 SET-UP menu, which...
  • Page 34 INSTALLING & SETTING-UP 76-02-031E...

  • Page 35: Configuring The Atm Cbr Dsu

    Event log, alarM event log, cOnfig event log Interface, Display mode, Summary style Performance data Physical layer stats, Error type, (PLCP layer stats), ATM stats/AAL1 stats, Clear all data Figure 5.1 ATM CBR DSU menu structure version 3.x 76-02-031E...
  • Page 36 Physical layer stats, Error type, (PLCP layer stats), ATM stats/AAL1 stats, Clear all data Figure 5.2 ATM CBR DSU menu structure version 4.x Note: Press the <escape> key on any screen to return to the previous screen in the structure.

  • Page 37: Main Set-Up Menu

    CONFIGURING THE ATM CBR DSU 5. 1 Main set-up menu The MAIN SET-UP menu leads to all the control and reporting functions of the ATM CBR DSU. The screen examples shown in this section are all for the CBR5900 DSU, which has a SDH/Sonet ATM UNI port, and an E3 CBR LINE port.

  • Page 38: Alarm Extension

    The SDH/SONET PORT is the ATM UNI port on the WAN side of the ATM CBR DSU, and the E3 PORT is that which is on the Customer side of the ATM CBR DSU, and is connected to a PABX or similar CBR device.
  • Page 39 Selecting a port leads to the alarm list for that port. The alarms are labelled from 0 to 9 and A to Z in the firmware. These label numbers are standard for all Metrodata DSUs. Only those alarms that apply to the particular interface are displayed. Initially they show their default settings, but they can be selected by their label, and toggled to a different level with choices MAJOR, MINOR or NONE.
  • Page 40 CONFIGURING THE ATM CBR DSU The configuration rules for the alarm extension are: MAJOR major relay MINOR minor relay NONE no relay Figure 5.8 Alarm relay status Notes: 1) Toggling the space bar permits the alarm to be configured by the user to MAJOR, MINOR or NONE.

  • Page 41: General Set-Up Menu

    The corresponding day of the week is also displayed when you press <enter> For the ATM CBR DSU, the year is always entered as an explicit 4 digit number (e.g. 2004), and processed as such in the firmware. Dates between 01/01/1980 and 31/12/2047 are valid.

  • Page 42: Node Name

    CONFIGURING THE ATM CBR DSU 5 . 2. 3 Node name This is the name of the unit to which you are currently connected. The top of the screen indicates the current node by displaying Local connection to "[nodename]" The ENTER NEW NAME prompt appears when you select the NODE NAME menu option.

  • Page 43: Output Config (Version4.X)

    Figure 5.14 Metrodata DSU Configuration dump file 76-02-031E...

  • Page 44: Input Config (Version4.X)

    CONFIGURING THE ATM CBR DSU 5 . 2. 7 Input config (version4.x) This item facilitates uploading of config information from a stored Text file into a DSU. It also requires the use of a PC as an intelligent Management terminal connected to the DSUs terminal port.

  • Page 45: Wan Port Set-Up Menu

    The DSU set-up screens display only the appropriate set-up options for the interface detected in the DSU. Sections 9 to 16 of this manual give set-up details and specifications for each type of port available on the ATM CBR DSU. 76-02-031E...

  • Page 46: Atm Set-Up Menu

    CONFIGURING THE ATM CBR DSU 5. 4 ATM set-up menu Layer 2 configuration is achieved with the ATM SET-UP menu. Configuration of Layer 2 operation is performed on a per-port basis. On selecting the menu item ATM SET-UP from the MAIN SET-UP menu, a screen appears which permits the required interface to be selected.

  • Page 47: Atm Definitions

    CONFIGURING THE ATM CBR DSU 5 . 4. 1 ATM definitions Brief definitions of the ATM set-up options are included below: FORWARD IDLE CELLS: This option permits idle cells, which contain no payload to be forwarded. In practise, they are usually deleted, and therefore the option is usually set to NO.

  • Page 48: Set-Up Menu

    CONFIGURING THE ATM CBR DSU 5. 5 V.24 set-up menu This menu may be accessed via a preliminary screen to provide for further options at firmware Version 4.0 and upwards. V.24 SET-UP Terminal set-up <menu> Figure 5.22 V.24 preliminary screen The TERMINAL SET-UP screen allows you to set up the communications parameters for the terminal attached to the management port.

  • Page 49: Baud Rate

    CONFIGURING THE ATM CBR DSU 5 . 5. 3 Baud rate The baud rates supported are 2400, 4800, 9600 and 19200 baud. 5 . 5. 4 Parity Parity may be set to NONE, ODD or EVEN. 5 . 5. 5 Data bits The number of data bits may be 7 or 8.

  • Page 50: Special Menu

    Figure 5.24 Special menu 5 . 7. 1 Software version This option displays the current version of the software on your ATM CBR DSU. This is provided for information only, and is typically version 3.xx or version 4.xx. 5 . 7. 2 Hardware version This option displays the current Version of the hardware on your DSU.

  • Page 51: Cold Start (Caution!)

    CONFIGURING THE ATM CBR DSU 5 . 7. 5 Cold start (Caution!) Selecting COLD START returns the DSUs software configuration to the default settings. All configuration parameters will be reset to their defaults, and the performance statistics database and event log will be cleared. The “[nodename]” will be erased, but the real-time clock will not be affected.

  • Page 52: Event Logs

    CONFIGURING THE ATM CBR DSU 5. 8 Event logs Event logs are intended to provide a long-term history of major occurrences on the system. They can be the first port of call for a network manager when investigating a problem, and serve to confirm the status of the DSU at any point in time from the last cold start.

  • Page 53: Config Event Log

    CONFIGURING THE ATM CBR DSU The ALARM EVENT LOG records alarms that have arisen since the last cold start. They are recorded simply as MAJOR or MINOR alarms with ON or OFF status. --- Alarm Event Log --- 17/2/2002 08:20:23 Major ON E3...

  • Page 54: Atm Cbr Dsu Checklist For Configuring Dsus

    CONFIGURING THE ATM CBR DSU 5. 9 ATM CBR DSU checklist for configuring DSUs This section acts as a checklist for setting up each DSU to establish a valid configuration for a particular application. It assumes that you have already connected the DSU as required, and know the Operator password.
  • Page 55 CONFIGURING THE ATM CBR DSU Step 6: ATM Set-up menu HCS COSET, PAYLOAD SCRAMBLING: Make sure that these parameters are compatible with the configuration of the network attached to the ATM UNI interface. Step 7: Bandwidth management The DSU contains a 128-cell bi-directional FIFO. This acts as a small overflow buffer between the two traffic streams to compensate for any delays in onward transmission.
  • Page 56 CONFIGURING THE ATM CBR DSU 76-02-031E...

  • Page 57: Analysing Performance

    The errors and alarms sections are intended to introduce and summarise the subject for the ATM CBR DSU family. Section 6.5 describes all aspects of the PLCP layer for DS3 interfaces. Section 6.6 describes all aspects of the ATM layer errors, alarms and statistics in a single self-contained section.
  • Page 58 ANALYSING PERFORMANCE Port type I/F Type RAI/ OOSP FERF CBR LINE E1 Major Minor CBR LINE Major Minor CBR LINE E3 Major Minor CBR LINE DS3 Major Minor ATM UNI Major Minor Major Major Minor Minor ATM UNI Major Minor Major Major Minor...

  • Page 59: Physical Layer Error & Alarm Definitions

    ANALYSING PERFORMANCE 6 . 2. 1 Physical Layer Error & Alarm definitions Errors and alarms are briefly defined in the table below. See the Metrodata LM1100 SNMP Enabler user manual for more comprehensive information on these definitions and the MIB’s which apply to each interface type.

  • Page 60: Performance Menus

    ANALYSING PERFORMANCE 6. 3 Performance menus When you select the PERFORMANCE DATA option from the MAIN SET-UP menu, the performance menu is displayed for the appropriate interface. The menu options will be described with the simple set-up options first. SDH/Sonet PERFORMANCE PERFORMANCE DATA...

  • Page 61: Report & Summary Formats

    ANALYSING PERFORMANCE 6. 4 Report & Summary formats The Report and Summary formats are described in this section for the Physical layer, although the comments may generally be applied to other layers. Reports and Summaries are quite different in the way that they are set up and operated, and therefore they are described separately.

  • Page 62: Full Report

    Figure 6.3. Note: If at any time the real-time clock is altered then the relative times of the report database are also modified. Metrodata CBR5900: Local connection to “[nodename]” E3 Interface 1 of 6...

  • Page 63: Rolling Report

    This option is a more economic version of the 15-minute summaries option where a line printer is used, since only one report line is added to the printout every 15 minutes. Metrodata CBR5900: Local connection to “[nodename]” E3 Interface 1 of 6...

  • Page 64: Summary Presentations

    ANALYSING PERFORMANCE 6 . 4. 3 Summary presentations The summary screens are designed to give a view of the alarm and error status on a single screen. There is a choice of update frequencies of the data so that the user can choose the optimum presentation at any time.

  • Page 65: Summary Style

    ANALYSING PERFORMANCE 6 . 4. 4 Summary style This option determines the method of presenting the error information in the summaries. These options are not available for the Full or Rolling reports, which have a fixed style. The SUMMARY STYLE option only shows on the menu when a SUMMARY has been selected in the DISPLAY MODE.

  • Page 66: Physical Layer Summary Display - Counts Style

    ANALYSING PERFORMANCE 6 . 4. 5 Physical layer summary display - COUNTS style This style applies to all types of summary i.e. STATIC, UPDATED, or 15-MINUTE. Metrodata CBR5900: Local connection to "[nodename]" 13:32:54 Mon 11/3/2002 PERFORMANCE SUMMARY SDH/Sonet Current Alarms: None...

  • Page 67: Physical Layer Summary Display - G.821 Style

    ANALYSING PERFORMANCE 6 . 4. 6 Physical layer summary display - G.821 style This style applies to all types of summary i.e. STATIC, UPDATED, or 15-MINUTE. Metrodata CBR5900: Local connection to "[nodename]" 13:32:54 Mon 11/3/2002 PERFORMANCE SUMMARY SDH/Sonet Current Alarms: None...

  • Page 68: Physical Layer Summary Display - Percent G.821 Style

    ANALYSING PERFORMANCE 6 . 4. 7 Physical layer summary display - Percent G.821 style This style applies to all types of summary i.e. STATIC, UPDATED, or 15-MINUTE. Metrodata CBR5900: Local connection to "[nodename]" 13:32:54 Mon 11/3/2002 PERFORMANCE SUMMARY SDH/Sonet Current Alarms: None...

  • Page 69: Plcp Layer Errors, Alarms & Statistics

    ANALYSING PERFORMANCE 6. 5 PLCP Layer Errors, Alarms & Statistics The only UNI interface that employs a PLCP layer is the DS3. PLCP layers do not apply to ATM CBR interfaces. SDH/Sonet PERFORMANCE PERFORMANCE DATA DATA Interface Interface SDH/Sonet Display mode Static summary Display mode Updated summary...
  • Page 70 ANALYSING PERFORMANCE PLCP (Physical Layer Convergence Protocol) statistics are displayed when the PLCP STATS option is selected from the PERFORMANCE DATA menu. PLCP display parameter definitions are: Display Definition Alarm Counts Summary Style Counts Total seconds Elapsed time of current interval Number of PLCP loss of frame events Number of PLCP remote alarm events (known...
  • Page 71 ANALYSING PERFORMANCE Metrodata CBR5900 : Local connection to "[nodename]" 13:32:54 Mon 11/3/2002 PLCP PERFORMANCE SUMMARY Current Alarms: None ------------------------------------------------ Diag: None Temporary Current Previous Last Counts 15 mins 15 mins 24 hours Alarm counts Total Secs 86400 BIP Errors Total secs...

  • Page 72: Atm Layer Errors, Alarms & Statistics

    ANALYSING PERFORMANCE 6. 6 ATM layer Errors, Alarms & Statistics The ATM layer errors and alarms are shown in the table below. ATM Errors & Alarms SDH/Sonet Errors Alarms Figure 6.17 ATM error & alarm types ATM Statistics are accessed from the PERFORMANCE DATA menu by selecting the menu item ATM LAYER STATS.
  • Page 73 ANALYSING PERFORMANCE The figure below shows a typical ATM performance summary screen: Metrodata CBR5900: Local connection to "[nodename]" 08:41:28 Mon 11/3/2002 PERFORMANCE SUMMARY SDH/Sonet Current Alarms: None ------------------------------- Diag: None Temporary Current Previous Last Counts 15 mins 15 mins 24 hours...
  • Page 74 ANALYSING PERFORMANCE The figure below shows a typical ATM performance FULL REPORT screen: Metrodata CBR5900: Local connection to “[nodename]” SDH/Sonet 1 of 6 Period % Bandwidth usage Alarm secs: Starting Transmit Receive HCS Err % Cell Valid Rate Usage 14:09:23 0.0000...

  • Page 75: Aal1 Statistics

    If the Sequence Number counter is cycling correctly and contains no errors, the 47-byte payload is added to the re-assembly buffer located in the ATM CBR DSU. The Sequence Number is CRC checked and errors are corrected if possible. The payload of corrected cells is added to the re-assembly buffer.

  • Page 76: Aal1 Displays

    ANALYSING PERFORMANCE 6 . 7. 2 AAL1 displays In Metrodata products AAL1 statistics are accessed via the PERFORMANCE DATA screen when the CBR interface has been selected. The menu item ATM LAYER STATS gives access to the AAL1 statistics. The path is:...
  • Page 77 ANALYSING PERFORMANCE Metrodata CBR5900: Local connection to "[nodename]" 17:31:18 Mon 11/3/2002 AAL1 PERFORMANCE SUMMARY Current Alarms: none ------------------------ Diag: None Temporary Current Previous Last Counts 15 mins 15 mins 24 hours Valid Secs 86400 LOSEQ Secs Seg. Cells 76800000 57600000...
  • Page 78 ANALYSING PERFORMANCE 76-02-031E...

  • Page 79: Remote Management (Snmp, Telnet)

    REMOTE MANAGEMENT (SNMP, TELNET) 7 REMOTE MANAGEMENT (SNMP, TELNET) In addition to using the terminal port, the ATM CBR DSU may be managed remotely by using a LAN-based network management system. The LM1100 SNMP Enabler option is fitted as standard to the DSU.
  • Page 80 REMOTE MANAGEMENT (SNMP, TELNET) The MANAGEMENT menu is shown below: MANAGEMENT Ethernet <menu> <menu> UDP‘ <menu> <menu> sNmp <menu> Telnet <display> tFtp <menu> HIGHLIGHTED letter - select item <escape> - exit menu Figure 7.2 Management menu The item TFTP is shown unshaded because it is a future release item, but is included here to indicate its forthcoming availability.

  • Page 81: Test & Troubleshooting

    8 TEST & TROUBLESHOOTING 8. 1 Test Several diagnostic tests are supported by the ATM CBR DSU. These may be used to identify the source of a transmission problem. Loop-backs may be activated to segment the link, and therefore validate signal flow along the path of the link. The fact that the signals are framed (with the exception of TAXI) can help identify a faulty or failed connection.

  • Page 82: Cbr Port-Local Loop

    When this test is activated the signal received from the CBR interface port passes through the cell matrix (inside the ATM CBR DSU) and is looped back at the UNI interface port. This therefore validates the signal flow through the ATM CBR DSU as seen from the CBR port of the DSU.
  • Page 83 TEST & TROUBLESHOOTING AAL1 CELL MATRIX AAL1 CELL MATRIX AAL1 CELL MATRIX Figure 8.2 Local loop & Outside loop tests 76-02-031E...

  • Page 84: Troubleshooting

    ATM switch port. If the LINE MINOR alarm LED goes out but problems persist, check that the peak cell rate of the connected ATM port has been set so that the buffer in the ATM CBR DSU is not overrun...

  • Page 85: E1 Cbr Port Configuration

    9 . 3. 3 Timing TIMING is used to select the clocking mode of the E1 port. This is fixed as THROUGH, meaning that the ATM CBR DSU pair are transparent to clocking. 9 . 3. 4 AIS Detection This option allows AIS detection to be ENABLED or DISABLED. The AIS detector should always remain enabled under normal datacomms conditions, and should only be disabled when there is a very low density of zeros in the traffic.

  • Page 86: E1 Atm Set-Up

    E1 CBR PORT CONFIGURATION 9. 4 E1 ATM Set-up The configuration of the E1 port ATM characteristics is set using the path MAIN SET-UP /ATM SET-UP/ E1 PORT The menu is used to select the PVC that is to be used for the circuit emulation (CBR) traffic. E1 PORT 1024 Figure 9.2 E1 ATM set-up menu...

  • Page 87: E1 Alarm Response

    E1 CBR PORT CONFIGURATION 9. 6 E1 Alarm Response In the presence of an alarm condition on the E1 port the following responses are established: Alarm Response MAJOR alarm lamp lights Other port transmits according to its AIS/RAI forwarding configuration MINOR alarm lamp lights Other port transmits according to its AIS/RAI forwarding configuration Figure 9.4 E1 Alarm responses...
  • Page 88 E1 CBR PORT CONFIGURATION 76-02-031E...

  • Page 89: E2 Cbr Port Configuration

    10 . 3. 3 Timing TIMING is used to select the clocking mode of the E2 port. This is fixed as THROUGH, meaning that the ATM CBR DSU pair are transparent to clocking. 10 . 3. 4 AIS Detection This option allows AIS detection to be ENABLED or DISABLED. The AIS detector should always remain enabled under normal datacomms conditions, and should only be disabled when there is a very low density of zeros in the traffic.

  • Page 90: E2 Atm Set-Up

    E2 CBR PORT CONFIGURATION 10. 4 E2 ATM Set-up The configuration of the E2 port ATM characteristics is set using the path the MAIN SET-UP /ATM SET-UP/ E2 PORT. The menu is used to select the PVC that is to be used for the circuit emulation (CBR) traffic.

  • Page 91: E2 Alarm Response

    E2 CBR PORT CONFIGURATION 10. 6 E2 Alarm Response In the presence of an alarm condition on the E2 port the following responses are established: Alarm Response MAJOR alarm lamp lights Other port transmits according to its AIS/RAI forwarding configuration MINOR alarm lamp lights Other port transmits according to its AIS/RAI forwarding configuration Figure 10.4 E2 Alarm responses...
  • Page 92 E2 CBR PORT CONFIGURATION 76-02-031E...

  • Page 93: E3 Cbr Port Configuration

    11 . 3. 3 Timing TIMING is used to select the clocking mode of the E3 port. This is fixed as THROUGH, meaning that the ATM CBR DSU pair are transparent to clocking. 11 . 3. 4 AIS Detection This option allows AIS detection to be ENABLED or DISABLED. The AIS detector should be enabled under normal datacomms conditions, and only be disabled when there is a very low density of zeros in the traffic.

  • Page 94: E3 Atm Set-Up

    E3 CBR PORT CONFIGURATION 11. 4 E3 ATM Set-up The configuration of the E3 port ATM characteristics is set using the path MAIN SET-UP/ ATM SET-UP/ E3 PORT. The menu is used to select the PVC that is to be used for the circuit emulation (CBR) traffic. E3 PORT 1024 Figure 11.2 E3 ATM set-up menu...

  • Page 95: E3 Alarm Response

    E3 CBR PORT CONFIGURATION 11. 6 E3 Alarm Response In the presence of an alarm condition on the E3 port the following responses are established: Alarm Response MAJOR alarm lamp lights Other port transmits according to its AIS/RAI forwarding configuration MINOR alarm lamp lights Other port transmits according to its AIS/RAI forwarding configuration Figure 11.4 E3 Alarm responses...
  • Page 96 E3 CBR PORT CONFIGURATION 76-02-031E...

  • Page 97: Ds3 Cbr Port Configuration

    12 . 3. 3 Timing TIMING is used to select the clocking mode of the DS3 port. This is fixed as THROUGH, meaning that the ATM CBR DSU pair is transparent to clocking. 12 . 3. 4 AIS Detection This option allows AIS detection to be ENABLED or DISABLED. The AIS detector should always remain enabled under normal datacomms conditions, and should only be disabled when there is a very low density of zero’s in the traffic.

  • Page 98: Ds3 Atm Set-Up

    DS3 CBR PORT CONFIGURATION 12. 4 DS3 ATM Set-up The configuration of the DS3 port ATM characteristics is set using the path MAIN SET-UP/ ATM SET-UP/ DS3 PORT The menu is used to select the PVC that is to be used for the circuit emulation (CBR) traffic. DS3 PORT 1024 Figure 12.2 DS3 ATM set-up...

  • Page 99: Ds3 Alarm Response

    DS3 CBR PORT CONFIGURATION 12. 6 DS3 Alarm Response In the presence of an alarm condition on the DS3 port the following responses are established: Alarm Response MAJOR alarm lamp lights Other port transmits according to its AIS/RAI forwarding configuration MINOR alarm lamp lights Other port transmits according to its AIS/RAI forwarding configuration Figure 12.4 DS3 Alarm responses...
  • Page 100 DS3 CBR PORT CONFIGURATION 76-02-031E...

  • Page 101: E3 Uni Port Configuration

    E3 UNI PORT CONFIGURATION 13 E3 UNI PORT CONFIGURATION 13. 1 E3 Physical interface The signal is transmitted on 75 Ohm RG59 unbalanced coax terminated with BNC connectors. HDB3 line coding is employed, per G.703 at 34⋅368 Mbit/s. 13. 2 E3 Framing Each frame is composed of 7 bytes of overhead and 530 bytes of payload.

  • Page 102: Ais Forwarding

    E3 UNI PORT CONFIGURATION 13 . 5. 4 AIS forwarding AIS FORWARDING is used to select the AIS (Alarm Indication Signal) alarm forwarding mode. Options are: Mode Description Never AIS never transmitted from the E3 port On RAI AIS transmitted from the E3 port when RAI on the other port On LOF/AIS AIS transmitted from the E3 port when LOF/AIS on other port Always AIS always transmitted from the E3 port...

  • Page 103: Payload Scrambling

    E3 UNI PORT CONFIGURATION 13 . 7. 1 Payload scrambling PAYLOAD SCRAMBLING prevents cell traffic from ghosting Frame Alignment patterns and thereby causing false framing. The default value is enabled. 13 . 7. 2 Idle cell payload The IDLE CELL PAYLOAD option allows special patterns to be configured in to idle cells. Most ATM UNI devices identify idle cells from the header alone (VPI, VCI, etc set to 0) and not the payload.

  • Page 104: E3 Physical Layer Error Types

    E3 UNI PORT CONFIGURATION 13. 9 E3 Physical layer error types Errors within the following primitives may be gathered to generate performance data: Display Description HDB3 Line Code Violation error Frame Frame alignment word errors BIP-8 BIP-8 (parity) errors FEBE FEBE’s (Far End Block Errors) giving statistics based upon far end receiver performance Figure 13.7 E3 Physical layer error types...

  • Page 105: E3 Alarm Responses

    E3 UNI PORT CONFIGURATION 13. 11 E3 Alarm responses In the presence of an alarm condition on the E3 port the following responses are established: Alarm Response MAJOR alarm lamp lights. E3 port transmits RAI Other port transmits according to its AIS/RAI forwarding configuration MAJOR alarm lamp lights.
  • Page 106 E3 UNI PORT CONFIGURATION 76-02-031E...

  • Page 107: Ds3 Uni Port Configuration

    DS3 UNI PORT CONFIGURATION 14 DS3 UNI PORT CONFIGURATION 14. 1 DS3 Physical interface The signal is transmitted on 75 Ohm RG59 unbalanced coax terminated with BNC connectors. B3ZS line coding is employed, per G.703 at 44⋅736 Mbit/s. 14. 2 DS3 Framing Each frame is composed of 14 bytes of overhead and 685 bytes of payload.

  • Page 108: Ais Forwarding

    DS3 UNI PORT CONFIGURATION 14 . 5. 4 AIS forwarding AIS FORWARDING is used to select the AIS (Alarm Indication Signal) alarm forwarding mode. Options are: Mode Description Never AIS never transmitted from the DS3 port On RAI AIS transmitted from the DS3 port when RAI on the other port On LOF/AIS AIS transmitted from the DS3 port when LOF/AIS on the other port Always AIS always transmitted from the DS3 port...

  • Page 109: Ds3 Atm Set-Up

    DS3 UNI PORT CONFIGURATION 14. 6 DS3 ATM set-up The DS3 port ATM characteristics are set using the path: MAIN SET-UP / ATM SET-UP / DS3 PORT DS3 PORT Forward idle cell HCS coset Enabled Payload scrambling Enabled Idle cell payload 0000000000000000 Figure 14.5 DS3 ATM set-up 14 .

  • Page 110: Ds3 Atm Masks

    DS3 UNI PORT CONFIGURATION 14. 7 DS3 ATM masks The DSU deletes cells whose headers match the mask identified by the IDLE CELLS entry. Note that IDLE cells have a CLP bit set to 1 while unassigned cells have this bit set to 0. (By default, this bit is set to x to delete both cell types.

  • Page 111: Ds3 Physical Layer Alarms

    DS3 UNI PORT CONFIGURATION 14. 9 DS3 Physical layer alarms The DS3 physical layer alarms that are detected are as follows: Display Description Loss of Signal, the Layer 0 receiver cannot detect signal Out of Frame, Layer 1 framer out of synchronization Signal Quality alarm, frame alignment pattern errors exceed 10 threshold Alarm Indication Signal (data pattern of all 1’s) detected...
  • Page 112 DS3 UNI PORT CONFIGURATION 76-02-031E...

  • Page 113: Taxi Uni Port Configuration

    TAXI UNI PORT CONFIGURATION 15 TAXI UNI PORT CONFIGURATION 15. 1 TAXI Physical Interface The signal is transmitted on 62.5/125um fibre at 1300nm (multimode) with transmitters and receivers equipped with ST connectors. The signal is transmitted at 125 Mbit/s using 4B5B line coding per ISO DIS9314-3.

  • Page 114: Taxi Atm Masks

    TAXI UNI PORT CONFIGURATION 15. 7 TAXI ATM Masks The DSU deletes cells whose headers match the mask identified by the IDLE CELLS entry. Note that IDLE cells have a CLP bit set to 1 while unassigned cells have this bit set to 0. (By default, this bit is set to x to delete both cell types).

  • Page 115: Sdh/Sonet Uni Port Configuration

    SDH/Sonet UNI PORT CONFIGURATION 16 SDH/SONET UNI PORT CONFIGURATION 16. 1 SDH/Sonet Physical Interface The various types of physical interfaces are tabulated below: Connector Fibre Type Wavelength Typical Tx Optical Loss Type Power Budget Dual SC Multimode 62.5/ 1300 um -21 dBm 11 dB 125 um...

  • Page 116: Sdh/Sonet Wan Set-Up

    SDH/Sonet UNI PORT CONFIGURATION 16. 5 SDH/Sonet WAN Set-Up The SDH/Sonet port parameters are set using the path MAIN SET-UP / WAN PORT SET-UP / SDH/SONET SDH/SONET PORT Framing C-bit parity Timing Internal AIS forwarding Never RAI forwarding Enabled Figure 16.3 SDH/Sonet Set-up 16 .

  • Page 117: Rai Forwarding

    SDH/Sonet UNI PORT CONFIGURATION 16 . 5. 4 RAI Forwarding RAI FORWARDING is used to select the RAI (Remote Alarm Indication) alarm forwarding mode. Options are: Mode Description Never RAI never transmitted from the SDH/Sonet port On RAI RAI transmitted from the SDH/Sonet port when RAI on the other port On LOF/AIS RAI transmitted from the SDH/Sonet port when LOF/...

  • Page 118: Sdh/Sonet Atm Masks

    SDH/Sonet UNI PORT CONFIGURATION 16. 7 SDH/Sonet ATM Masks The DSU deletes cells whose headers match the mask identified by the IDLE CELLS entry. Note that idle cells have a CLP bit set to 1 while unassigned cells have this bit set to 0. (By default, this bit is set to x to delete both cell types).

  • Page 119: Sdh/Sonet Alarm Response

    SDH/Sonet UNI PORT CONFIGURATION 16. 9 SDH/Sonet Alarm Response In the presence of an alarm condition on the SDH/Sonet port the following responses are established: Alarm Response MAJOR alarm lamp lights SDH/Sonet port transmits RAI Other port transmits according to its AIS/RAI forwarding configuration MINOR alarm lamp lights SDH/Sonet port transmits RAI Other port transmits according to its AIS/RAI forwarding configuration...
  • Page 120 SDH/Sonet UNI PORT CONFIGURATION 76-02-031E...
  • Page 121 SPECIFICATIONS 17 SPECIFICATIONS 17. 1 CBR Ports E1 CBR port INTERFACE TYPE PHYSICAL (LAYER 0) BNC, 75 Ohm coax BARRIER: EN 41003 compliant DATA RATE: 2.048 Mbit/s per G.703 LINE CODING: HDB3 per G.703 JITTER TOLERANCE: per G.823 FRAMING (LAYER 1) Unframed PLCP (LAYER 1 none...
  • Page 122 SPECIFICATIONS E3 CBR port INTERFACE TYPE PHYSICAL (LAYER 0) BNC, 75 Ohm coax BARRIER: EN 41003 compliant DATA RATE: 34.368 Mbit/s per G.703 LINE CODING: HDB3 per G.703 JITTER TOLERANCE: per G.823 FRAMING (LAYER 1) Unframed PLCP (LAYER 1 none ATM (LAYER 2) none AAL1 LAYER...
  • Page 123 SPECIFICATIONS 17. 2 ATM UNI Ports E3 UNI PORT INTERFACE TYPE PHYSICAL (LAYER 0) BNC, 75 Ohm coax BARRIER: EN 41003 compliant DATA RATE: 34.368 Mbit/s per G.703 LINE CODING: HDB3 per G.703 JITTER TOLERANCE: per G.823 FRAMING (LAYER 1) G.832/G.804 PLCP (LAYER 1 none...
  • Page 124 SPECIFICATIONS TAXI UNI PORT I/F TYPE TAXI PHYSICAL (LAYER 0) ST, multimode fibre DATA RATE: 100 Mbps per ISO DIS9314-3 FRAMING (LAYER 1) ANSI X3T9.5, 4B5B PLCP (LAYER 1 none ATM (LAYER 2) 231,481 cells/second ATM LAYER ERRORS: SDH/Sonet OPTICAL UNI PORT I/F TYPE SONET/OC-3/STS-3 SDH/STM-1 PHYSICAL (LAYER 0)
  • Page 125 SPECIFICATIONS SDH/Sonet ELECTRICAL UNI PORT I/F TYPE SONET/OC-3/STS-3 SDH/STM-1 PHYSICAL (LAYER 0) Dual BNC connectors PHYSICAL (LAYER 0) ATM User Device: RJ45 connector* PHYSICAL (LAYER 0) ATM Network Equipment: RJ45 connector* DATA RATE: 155.52 Mbps per G.957 FRAMING (LAYER 1) G.709 PLCP (LAYER 1 I.432...
  • Page 126 Ambient Temperature: 0degC to +50degC Storage Temperature: -20degC to +70degC Relative Humidity: 0% - 95% non condensing Barometric Pressure 86 KPa - 106 KPa 17. 4 ATM CBR DSU default settings Option Default Node name This field cleared Password CBRnnnn where nnnn is DSU...
  • Page 127 GLOSSARY 18 GLOSSARY Application Adaptation Layer Alarm Indication Signal Alternate Mark Inversion Asynchronous Serial Interface Asynchronous Transfer Mode B3ZS Binary Three Zero Suppression Bursty Errored Seconds Bit Interleaved Parity Bi Polar Violation Constant Bit Rate Circuit Emulation Coded Mark Inversion Cyclic Redundancy Check Degraded Minutes Data Service DSU...
  • Page 128 GLOSSARY Loss Of Frame Alarm Loss Of Signal Alarm LOSEQ Loss Of SEQuence Management Information Base Network Interface Network Management System Non Return to Zero Out of Frame Alarm OOSP Out of Spec Clock Alarm PLCP Physical Layer Convergence Protocol Permanent Virtual Channel Remote Alarm Indication (aka FERF) REBE...

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