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Troubleshooting
Related Manuals for Metrodata FM4800
Summary of Contents for Metrodata FM4800
- Page 1 FM4800 www.metrodata.co.uk Metrodata FM4800 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: 76-02-007F website: www.metrodata.co.uk...
- 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.
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Page 5: Table Of Contents
4. 7 X.21 DTE port 4. 8 X.21 to EIA-530 Conversion 4. 9 X.21 to RS-449 Conversion cable 4. 10 Network Connection FM4800 INSTALLING & SETTING-UP 5. 1 Connections 5. 2 Power-Up Sequence 5. 3 User Interface 5 . 3. 1 TTY terminal 5 . - Page 6 6. 4 WAN (Line) Port Set-up Menu 6 . 4. 1 Framing 6 . 4. 2 Line coding 6 . 4. 3 Timing 6 . 4. 4 AIS Detection 6. 5 DTE Set-up Menu 6 . 5. 1 State 6 . 5. 2 Interface type 6 .
- Page 7 9 . 2. 1 DTE Loop Network Interface (NI) 9 . 3. 1 NI Remote Loop 9 . 3. 2 NI Local Loop Test Pattern Remote management during testing Troubleshooting FM4800 SPECIFICATIONS 10. 1 FM4800 Default Settings 10. 2 Glossary...
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Page 9: Introduction
The FM4800 interfaces a E2 service (8.448 Mbit/s) and Data Terminal Equipment presenting an X.21 interface. FM4800 DSU’s are used in pairs, one at either end of a Wide Area Network (WAN) link. One end is called the LOCAL node, and the other the REMOTE node. -
Page 10: Typical Fm4800 Installation
INTRODUCTION 1. 2 Typical FM4800 Installation ROUTER X.21 FM4800 E2 LINK E2 LINK FM4800 X.21 ROUTER Figure 1. 1 FM4800 Deployment 76-02-007F... -
Page 11: About This Manual
Section 10 lists the various specifications of the FM4800, and at the rear of the manual menu charts are included as an aid to installing the FM4800. -
Page 12: Conventions
Where menu items are referred to in the text, these are shown in italics to help the reader to cross relate to menu information. Screen examples: the FM4800 allows you to use one of three options for displaying the menus on a terminal - ANSI, VT100/VT220 or TTY. -
Page 13: Statutory Information
These standards permit connection to the public 8.448 Mbit/s network network. The FM4800 maintains bit integrity between the network port and the DTE port. The FM4800 should not be connected to cabling which would be required by BS6701 to be equipped with over-voltage protection. -
Page 14: Power Supply
STATUTORY INFORMATION 2.6 Power Supply The FM4800 is powered by a mains power supply with an input voltage range 100-250 VAC/ 50-400 Hz. The maximum input current is approximately 0.2A rms. at 240V. An alternative -48V DC power supply unit is available, the supply definition being minus 36 to minus 72VDC. -
Page 15: Technical Overview
(and therefore clocking information) and an average DC potential of 0V. The transmission rate is 8⋅448 Mbit/s. 3. 2 Payload The DTE connected to the FM4800 will be clocked at a line rate of 8⋅448 Mbit/s. Data from the DTE is carried on the E2 aggregate as unstructured payload. 76-02-007F... - Page 16 TECHNICAL OVERVIEW 76-02-007F...
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Page 17: Introducing The Fm4800
INTRODUCING THE FM4800 4 INTRODUCING THE FM4800 The FM4800 is supplied in a metal enclosure for tabletop or 19” rack mounting using the optional rack mounting ears that bolt onto the side of the module. 4. 1 Front panel LINE... -
Page 18: Rear Panel
Figure 4.3 FM4800 Rear panel 4. 3 Power Supply The FM4800 is powered by a mains power supply with an input voltage range 100-250 VAC / 50-400 Hz. The maximum input current is 0⋅2A rms. at 240V. An alternative -48VDC powered unit is available. The input voltage and current ranges are - minus 36 to minus 72 volts DC. -
Page 19: Remote Management Port
This port contains either a 6-pin mini-DIN connector or a 9-pin D-type connector, allowing you to connect the major and minor alarm relay contacts within the FM4800 to a remote indicator, such as a bell or a lamp. The two types of connectors are described below. The Major alarm contacts are normally open, so that major alarm indication is given if the mains power supply to the DSU should fail. -
Page 20: Terminal Port
INTRODUCING THE FM4800 Function Shield Major common Minor N/O Minor N/C Not connected Major N/C Major N/O Minor common Not connected Figure 4.7 9-pin D-type connector layout 4. 6 Terminal Port The terminal port is provided for local management of the FM4000. It is a female 25-pin D- type connector with a full RS232 layout which is shown below. -
Page 21: Minimum Rs232 Connection
INTRODUCING THE FM4800 4 . 6. 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 (DSU) Female Transmit Receive 4 loop to 6... -
Page 22: Connecting To A Pc Com Port
INTRODUCING THE FM4800 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 4.11 Terminal port default settings 4 . -
Page 23: Dte Port
INTRODUCING THE FM4800 4. 7 X.21 DTE port The X.21 DTE port is equipped with a female DA15 connecter in accordance with ISO4903. The layouts are shown below. Note: The X.21 port is regarded as a SELV port within the scope of EN 41003. -
Page 24: To Eia-530 Conversion
INTRODUCING THE FM4800 4. 8 X.21 to EIA-530 Conversion To convert from X.21 to EIA-530 a simple converter cable may be used, as shown below: X.21 X.21 Signal EIA-530 Signal EIA-530 15way D Function CCT No Function 25 way D... -
Page 25: To Rs-449 Conversion Cable
INTRODUCING THE FM4800 4. 9 X.21 to RS-449 Conversion cable To convert between X.21 and RS449 a simple converter cable may be used. The connections are shown below: X.21 X.21 Signal RS-449 Signal RS-449 15 way Function CCT No Function... -
Page 26: Network Connection
The port type is classified as 5C (unstructured port) within the scope of OTR.001. The FM4800 provides bit integrity between the E2 port and the DTE port with a worst case round trip delay of 64 microseconds. -
Page 27: Fm4800 Installing & Setting-Up
FM4800 INSTALLING & SETTING-UP 5 FM4800 INSTALLING & SETTING-UP This chapter describes how to set up the FM4800 ready for use. It covers the initial connections, powering on the unit, and how to access the software that controls the operating parameters. -
Page 28: Power-Up Sequence
Figure 5.1 Start-up screens In order to check or change any of the operating parameters, you will first need to gain access to the FM4800's software by logging in. Press any key, and a logon message will be displayed: Metrodata FM4800: Local connection to "[nodename] "... -
Page 29: User Interface
The item MANAGEMENT only appears if the LM1100 SNMP Enabler has been fitted to the FM4800. When you press a letter which leads to a further menu, the screen will scroll up and the new menu will be displayed. Pressing a letter corresponding to a menu option will lead to additional prompts at the bottom of the screen: <space>... -
Page 30: Vt100/Vt220 And Ansi Terminals
Figure 5.5 VT/ANSI Main set-up menu The item MANAGEMENT only appears if the LM1100 SNMP Enabler has been fitted to the FM4800. When you press a letter which leads to a further menu, the screen will be refreshed without scrolling, displaying the new menu. -
Page 31: Default Settings
The default settings for the terminal connected to the management port are given in the table below. The terminal must be set to the FM4800’s default values after performing a cold start. Once this is done, the FM4800’s V.24 settings can be changed using the V.24 SET-UP menu, which is accessed from the MAIN SET-UP menu described in the next section. - Page 32 FM4800 INSTALLING & SETTING-UP 76-02-007F...
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Page 33: Configuring The Fm4800
System, Alarm & Config Event logs Interface, Display mode, Summary style Performance data Physical layer stats, Error type, Clear all data Figure 6.1 FM4800 Menu structure Pressing the <escape> key on any screen will return you to the previous screen in the structure. 76-02-007F... -
Page 34: Main Set-Up Menu
CONFIGURING THE FM4800 6. 2 Main Set-up Menu MAIN SET-UP alarm eXtension <menu> General set-up <menu> WAN port set-up <menu> DTE set-up <menu> V.24 set-up <menu> Management <menu> Testing <menu> Special <menu> Performance data <menu> HIGHLIGHTED letter - select item <escape>... -
Page 35: Clear Alarm Outputs
The NI PORT option shown below provides a display of all the alarms which are valid for the FM4800. in each operating mode. The alarms are labelled from 0 to 9 and A to Z in the firmware, and can be selected by their label. -
Page 36: General Set-Up Menu
CONFIGURING THE FM4800 6. 3 General Set-up Menu GENERAL SET-UP Time 16:25:23 Date Mon 15/10/01 Node name “nodename” Password telNet timeout HIGHLIGHTED letter - select item <escape> - exit menu Figure 6.7 General set-up menu Note: TELNET TIMEOUT option appears only if the LM1100 SNMP Enabler has been fitted. -
Page 37: Password
This option is used to change the current password. The supervisory password, which allows you to change settings, is initially set to the model number, i.e. FM4800. If you wish to change the password, select this item and then enter the new password. The password may be up to 16 characters with no spaces permitted. -
Page 38: Wan (Line) Port Set-Up Menu
This setting cannot be altered, and is for information only. The value is HDB3 (High Density Binary 3) 6 . 4. 3 Timing This details the clocking employed in the FM4800, and the optionss are INTERNAL, DTE and LOOP. With INTERNAL mode selected the E2 transmit clock is derived from the FM4800’s own internal oscillator. -
Page 39: Ais Detection
CONFIGURING THE FM4800 Internal Osc 15 ppm Line Port DTE Port Internal Line Tx CCITT CCT 113 PLL VCXO Loop Internal Buffer PLL VCO Line Rx CCITT CCT 114 Line Rx Buffer PLL VCO CCITT CCT 115 PLL = Phase lock loop... -
Page 40: Dte Set-Up Menu
6 . 5. 2 Interface type This shows the type of DTE port fitted to the FM4800 - X.21- and is for information only. 6 . 5. 3 Transmit timing XMIT TIMING determines the source of the transmit clock. Options are LINE Rx (E2 Rx), and DTE (Circuit 113). -
Page 41: Set-Up Menu
CONFIGURING THE FM4800 6. 6 V.24 Set-up Menu This screen allows you to set up the communications parameters for the terminal management port. V.24 SET-UP Terminal type VT100/VT220 Baud rate 9600 bps Parity None Data bits Stop bits Modem support... -
Page 42: Load New Config
Except for the TERMINAL TYPE, the changes you make on the V.24 Set-up screen do not take effect until you register the changes in the FM4800. This is done by selecting LOAD NEW CONFIG after making the necessary changes to the other values on this screen. You should then change your terminal settings to match these new values. -
Page 43: Special
This menu handles equipment version status and start-up modes, and event logs. 6 . 8. 1 Software version This option displays the current version of the software on your FM4800. This is provided for information only. The format of the Version is 3.xx. -
Page 44: Event Logs
They can be the first port of call for a network manager when investigating a problem, and serve to confirm the status of the FM4800 at any point in time from the last cold start. If a cold start is performed, this log will be cleared and the first entry in the log will be the date and time of that cold start. -
Page 45: Performance Data
14/1/2001 11:32:38 Config updated Press any key to continue Figure 6.18 Config event log 6. 9 Performance Data This option gives you access to the FM4800's performance monitoring functions. These are described in detail in Section 7, Analysing Performance. 76-02-007F... -
Page 46: Unit Set-Up Checklist
CONFIGURING THE FM4800 6. 10 Unit Set-up Checklist The FM4800 DSUs are used in pairs, one at each end of the WAN link. This section acts as a checklist for setting up each unit to establish a valid configuration for a particular application. -
Page 47: Analysing Performance
7 ANALYSING PERFORMANCE 7. 1 Introduction The FM4800 provides you with extensive performance analysis functions, which allow you to monitor and record service information about the E2 link. The first part of this section describes the Errors and Alarms that are valid for the modes of operation of the FM4800. -
Page 48: Wan (Line) Port Alarm Responses
ANALYSING PERFORMANCE 7 . 2. 3 WAN (Line) Port alarm responses The default responses in Figure 7.2 below are established in the presence of an alarm condition on the E2 port. An alarm or alarms can be cancelled by selecting the ALARM EXTENSION / CLEAR ALARM OUTPUTS option from the MAIN SET-UP menu. -
Page 49: Error And Alarm Definitions
The CLEAR ALL DATA option clears the complete performance statistics database. This may be necessary if the FM4800 contains data that is invalid, perhaps because the data was obtained from a different circuit or the unit has been powered down, or reconfigured. You will be prompted to confirm this option. -
Page 50: Performance Menu
ANALYSING PERFORMANCE 7. 3 Performance menu PERFORMANCE DATA Interface Display mode Static summary Summary style G.821 Phys. Layer stats <display> Error type PRBS Errors Clear all data HIGHLIGHTED letter - select item <escape> - exit menu Figure 7.6 Performance data menu 7 . -
Page 51: Physical Layer Statistics - Reports
The alarm columns displayed are in accordance with the table in Figure 7.2. Note: If the real-time clock is altered then the relative times of this database are also modified. Metrodata FM4800: Local connection to “[nodename]” NI Interface 1 of 6 PRBS Errors:... -
Page 52: 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 FM4800: Local connection to “[nodename]” NI Interface 1 of 6... -
Page 53: Physical Layer Statistics - Summaries
ANALYSING PERFORMANCE 7. 5 Physical layer statistics - Summaries 7 . 5. 1 Screen presentation The summary report 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 54: Summary Style
ANALYSING PERFORMANCE 7 . 5. 3 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 55: Summary Display - Counts Style
ANALYSING PERFORMANCE 7 . 5. 4 Summary display - COUNTS style Metrodata FM4800: Local connection to "[nodename]" 13:32:54 Mon 15/10/2001 PERFORMANCE SUMMARY Current Alarms: None ------------------------------------------------ Diag: None Temporary Current Previous Last Counts 15 mins 15 mins 24 hours Alarm counts... -
Page 56: Summary Display - G.821 Style
ANALYSING PERFORMANCE 7 . 5. 5 Summary display - G.821 style Metrodata FM4800: Local connection to "[nodename]" 13:32:54 Mon 15/10/2001 PERFORMANCE SUMMARY Current Alarms: None ------------------------------------------------ Diag: None Temporary Current Previous Last Counts 15 mins 15 mins 24 hours Alarm counts... -
Page 57: Summary Display - Percent G.821 Style
ANALYSING PERFORMANCE 7 . 5. 6 Summary display - Percent G.821 style Metrodata FM4800: Local connection to "[nodename]" 13:32:54 Mon 15/10/2001 PERFORMANCE SUMMARY Current Alarms: None ------------------------------------------------ Diag: None Temporary Current Previous Last Counts 15 mins 15 mins 24 hours... - Page 58 ANALYSING PERFORMANCE 76-02-007F...
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Page 59: Remote Management
REMOTE MANAGEMENT 8 REMOTE MANAGEMENT In addition to using the terminal port, the FM4800 may be managed remotely by using a LAN-based network management system. In order to do this, the LM1100 SNMP Enabler option must be fitted to the FM4800. - Page 60 For further information on the management interface and the MIB definition, refer to the LM1100 SNMP Enabler user manual. The MIB definitions supported have been placed in the public domain by Metrodata and can be parsed in to any NMS supporting an ASN.1 MIB parser.
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Page 61: Test & Troubleshooting
2 -1 inverted test pattern as specified by the CCITT. The options are ON, OFF or Rx ONLY. In this last mode the FM4800 does not affect the data being passed but monitors for the test pattern. 76-02-007F... -
Page 62: Dte Interface
Figure 9.2 DTE Loop test This therefore validates: a) the local DTE cable (without the effect of the FM4800) if the local DTE recognises its own transmissions. b) the remote DTE cable, the E2 link and both FM4800’s if the remote DTE recognises its own transmissions. -
Page 63: Network Interface (Ni)
This therefore validates: a) the remote DTE cable if the remote DTE recognises its own transmissions b) the local DTE cable, the local FM4800 and the E2 link if the local DTE recognises its own transmissions. -
Page 64: Ni Local Loop
9.5 Remote management during testing Care must be taken when testing. If the FM4800 is managed with SNMP or Telnet, and if the LAN to which the NMS is connected passes over the wide-area link to which the FM4800 is interfacing. -
Page 65: Troubleshooting
TEST & TROUBLESHOOTING 9.6 Troubleshooting This section describes procedures to deal with common problems that may occur when setting up a unit. Step 1: Establish And Verify The E2 Link Check the power LED at both ends. If power is not present, check the mains fuse. If the MAJOR alarm LED is on, try swapping the BNC connections at one end. - Page 66 TEST & TROUBLESHOOTING 76-02-007F...
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Page 67: Fm4800 Specifications
FM4800 SPECIFICATIONS 10 FM4800 SPECIFICATIONS Parameter Definition E2 interface G.703 compliant, Sensitivity: -10dB. Line coding: HDB3. Interface type: 75 Ohm unbalanced coax (BNC) Jitter Tolerance: Per G.823. Barrier: EN 41003 compliant barrier provided on NI interface. DTE Interface: 15 way female DA15 per ISO 4903. -
Page 68: Fm4800 Default Settings
FM4800 SPECIFICATIONS 10. 1 FM4800 Default Settings When a cold start is performed, all values are returned to their default settings. The table below lists the default values. Option Default Node name This field cleared Password FM4800 Telnet Timeout 60 seconds... -
Page 69: Glossary
FM4800 SPECIFICATIONS 10. 2 Glossary Alarm Indication Signal Alternate Mark Inversion Asynchronous Transfer Mode Bursty errored seconds Degraded minutes Data Service Unit Data Terminal Equipment Error-free seconds Errored seconds FEBE Far End Block Error HDB3 High Density Binary 3 Local Area Network...
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