Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Troubleshooting
Related Manuals for Metrodata FM4850
Summary of Contents for Metrodata FM4850
- Page 1 FM4850 www.metrodata.co.uk Metrodata FM4850 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: 76-02-014G 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.
-
Page 5: Table Of Contents
INTRODUCTION 1. 1 About The FM4850 1. 2 Typical FM4850 Installation 1. 3 About This Manual 1. 4 Conventions STATUTORY INFORMATION Performance Safety Electromagnetic Compatibility 2. 4 EN55022 Declaration 2. 5 FCC Declaration Power Supply On board batteries TECHNICAL OVERVIEW 3. - Page 6 6 . 3. 2 Date 6 . 3. 3 Node name 6 . 3. 4 Password 6 . 3. 5 Telnet Timeout 6. 4 WAN (Line) Port Set-up Menu 6 . 4. 1 Framing 6 . 4. 2 Line coding 6 .
- Page 7 DTE External Loop Network Interface (NI) 9 . 3. 1 NI Remote Loop 9 . 3. 2 NI Local Loop Remote management during testing Troubleshooting FM4850 SPECIFICATIONS 10. 1 FM4850 Clocking modes 10. 2 FM4850 Default Settings 10. 3 Glossary...
-
Page 9: Introduction
The FM4850 interfaces a E2 service (8.448 Mbit/s) and Data Terminal Equipment presenting a High Speed Serial Interface (HSSI) port. FM4850 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 Fm4850 Installation
INTRODUCTION 1. 2 Typical FM4850 Installation ROUTER HSSI FM4850 E2 LINK E2 LINK FM4850 HSSI ROUTER Figure 1. 1 FM4850 Deployment 76-02-014G... -
Page 11: About This Manual
Section 10 lists the various specifications of the FM4850, and at the rear of the manual menu charts are included as an aid to installing the FM4850. -
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 FM4850 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 FM4850 maintains bit integrity between the network port and the DTE port. The FM4850 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 FM4850 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
Frame alignment signal (FAS) 1111010000 Remote alarm indication (RAI) National bit Figure 3. 1 Path overhead 3. 4 Payload The FM4850 operates with a DTE port data rate of 8.448 Mbit/s in unframed mode, or 8Þ328 Mbit/s in G.742 framed mode. 76-02-014F... - Page 16 TECHNICAL OVERVIEW 76-02-014F...
-
Page 17: Introducing The Fm4850
INTRODUCING THE FM4850 4 INTRODUCING THE FM4850 The FM4850 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 FM4850 Rear panel 4. 3 Power Supply The FM4850 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 FM4850 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 FM4850 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: Terminal Cable 25 Way To 25 Way
INTRODUCING THE FM4850 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 FM4850 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 4 . 6. 3 Connecting to a PC COM port A converter cable can be supplied to convert from the 25-way female D-type connector on the rear panel of the DSU to a 9-way D-type connector. -
Page 23: Hssi Port
INTRODUCING THE FM4850 4. 7 HSSI Port The HSSI EIA613 DTE port is used to connect to the router. It consists of a female miniature 50-pin AMP connector, whose pins are described below. AMP connector part number 749111-4 should be used for connections to this port. -
Page 24: Network Connection
The port type is classified as 5C (unstructured port) within the scope of OTR.001. The FM4850 provides bit integrity between the E2 port and the DTE port with a worst case round trip delay of 8 microseconds. -
Page 25: Installing & Setting-Up
INSTALLING & SETTING-UP 5 INSTALLING & SETTING-UP This chapter describes how to set up the FM4850 ready for use. It covers the initial connections, powering on the unit, and how to access the software that controls the operating parameters. Setting and changing these parameters is covered in Section 6, Configuring FM4850. -
Page 26: 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 FM4850's software by logging in. Press any key, and a logon message will be displayed: Metrodata FM4850: Local connection to "[nodename] "... -
Page 27: User Interface
The display of the menu, and the way you select menu options, will depend on which type of terminal you have connected to the unit, and which version of FM4850 firmware you have. This section describes the differences between the three main types of data display - how to change the display set-up is described at the end of this section. -
Page 28: Vt100/Vt220 And Ansi Terminals
G.742 framed mode is selected and DATALINK is enabled. The item MANAGEMENT only appears if the LM1100 SNMP Enabler has been fitted to the FM4850. If you press a letter corresponding to a menu option, the value opposite that option will be highlighted. -
Page 29: 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 FM4850’s default values after performing a cold start. Once this is done, the FM4850’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 30 INSTALLING & SETTING-UP 76-02-014G...
-
Page 31: Configuring The Fm4850
System, Alarm & Config Event logs Interface, Display mode, Summary style Performance data Physical layer stats, Error type, Clear all data Figure 6.1 FM4850 Menu structure Pressing the <escape> key on any screen will return you to the previous screen in the structure. 76-02-014G... -
Page 32: Main Set-Up Menu
CONFIGURING THE FM4850 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> Remote logon <display> Testing <menu> Special <menu> Performance data <menu> HIGHLIGHTED letter - select item <escape>... -
Page 33: Clear Alarm Outputs
The NI PORT option shown below provides a display of all the alarms which are valid for the FM4850. 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 34: General Set-Up Menu
CONFIGURING THE FM4850 Toggling the space bar permits the alarm to be configured by the user to MAJOR, MINOR or NONE. This affects which alarm extension relay is affected by an alarm. The configuration rules are: MAJOR major relay MINOR... -
Page 35: Date
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. FM4850. 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 36: 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 FM4850, and the values are INTERNAL and LOOP. The E2 Line Tx clock is derived from the DTE using CCT 113 (TT: terminal timing). - Page 37 CONFIGURING THE FM4850 DTE Port WAN (Line) Port Line Tx Clock VCXO Recovery CCITT CCT 113 Clock Gate CCITT CCT 114 Master Master Oscillator 15 ppm Receive Line Rx Framer PLL = Phase lock loop VCXO = Voltage controlled crystal oscillator Figure 6.12 Clocking diagram...
-
Page 38: Datalink
The DATALINK facility is only available in G.742 Framed mode. It enables you to control and monitor statistics from the remote FM4850. The options are ON or OFF. The National bit is used to provide 9.962 Kbit/sec of datalink bandwidth. When datalink is set to OFF, the National bit is set to 1. -
Page 39: Dte Set-Up Menu
Figure 6.14 DTE set-up menu 6 . 5. 1 Interface type This shows the type of DTE port fitted to the FM4850 - HSSI- and is for information only. 6 . 5. 2 CA This controls the CA (Control Available) signal. It can be set to ON, OFF, or THROUGH. -
Page 40: Set-Up Menu
CONFIGURING THE FM4850 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 41: 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 FM4850. 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 42: Special
This menu handles equipment version status and start-up modes, and also event logs. 6 . 8. 1 Software version This option displays the current version of the software on your FM4850. This is provided for information only. The format of the Version is 3.xx. -
Page 43: 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 FM4850 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 44: Performance Data
Section 7, Analysing Performance. 6. 10 Unit Set-up Checklist The FM4850 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 45 TIMING: We recommend that one FM4850 is set to INTERNAL timing and the other is set to LOOP timing. The units will operate with both set to Internal timing. The units may work if both are set to LOOP timing but this is not recommended.
- Page 46 CONFIGURING THE FM4850 76-02-014G...
-
Page 47: Analysing Performance
7 ANALYSING PERFORMANCE 7. 1 Introduction The FM4850 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 FM4850. -
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: Summary Of Errors And Alarms By Mode
The CLEAR ALL DATA option clears the complete performance statistics database. This may be necessary if the FM4850 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: Error And Alarm Definitions
G.821, or events if the style is set to counts. Remote Alarm Indication: the Remote FM4850 has detected a prob- lem. The units are seconds if the summary style is G.821, or events if the style is set to counts. -
Page 51: 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 Clear all data HIGHLIGHTED letter - select item <escape> - exit menu Figure 7.6 Performance data menu 7 . 3. 1 Interface This field is for the selection of the interface for which statistics are to be displayed. -
Page 52: 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 FM4850: Local connection to “[nodename]” NI Interface 1 of 6 LOS Errors:... -
Page 53: 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 FM4850: Local connection to “[nodename]” NI Interface 1 of 6... -
Page 54: 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 55: 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 56: Summary Display - Counts Style
ANALYSING PERFORMANCE 7 . 5. 4 Summary display - COUNTS style Metrodata FM4850: 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 - G.821 Style
ANALYSING PERFORMANCE 7 . 5. 5 Summary display - G.821 style Metrodata FM4850: 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 58: Summary Display - Percent G.821 Style
ANALYSING PERFORMANCE 7 . 5. 6 Summary display - Percent G.821 style Metrodata FM4850: 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 59: Remote Management
REMOTE MANAGEMENT 8 REMOTE MANAGEMENT In addition to using the terminal port, the FM4850 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 FM4850. - 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.
-
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 FM4850 does not affect the data being passed but monitors for the test pattern. 76-02-014G... -
Page 62: External Loop Control
Figure 9.2 DTE Loop test This therefore validates: a) the local DTE cable (without the effect of the FM4850) if the local DTE recognises its own transmissions. b) the remote DTE cable, the E2 link and both FM4850’s if the remote DTE recognises its own transmissions. -
Page 63: Dte External Loop
When the EXTERNAL LOOP is activated the FM4850 uses one of the HSSI control lines (LC) to put the local DTE into loop. HSSI HSSI Figure 9.3 DTE External loop Test This validates the E2 link, both FM4850’s and both sets of DTE cables if the remote DTE recognises its own signals. 76-02-014G... -
Page 64: 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 FM4850 and the E2 link if the local DTE recognises its own transmissions. -
Page 65: Ni Local Loop
9.4 Remote management during testing Care must be taken when testing. If the FM4850 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 FM4850 is interfacing. -
Page 66: Troubleshooting
9.5 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. Set both units to UNFRAMED mode using the WAN PORT SET-UP menu: If the MAJOR alarm LED is on, try swapping the BNC connections at one end. -
Page 67: Fm4850 Specifications
FM4850 SPECIFICATIONS 10 FM4850 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. Framing: G.742, Unframed. DTE Interface: HSSI: 50 way miniature AMP connector. -
Page 68: Fm4850 Clocking Modes
FM4850 SPECIFICATIONS 10. 1 FM4850 Clocking modes The DTE should fully comply with the HSSI specification EIA613 with respect to the signal presented on Circuit 113 (TT). This should be directly connected to Circuit 114 (ST) with a fixed delay of less than 150ns between the two signals. -
Page 69: Glossary
FM4850 SPECIFICATIONS 10. 3 Glossary Alarm Indication Signal Alternate Mark Inversion Asynchronous Transfer Mode Bursty errored seconds Control Available Degraded minutes Data Service Unit Data Terminal Equipment Error-free seconds Errored seconds FEBE Far End Block Error HDB3 High Density Binary 3... - Page 70 FM4850 SPECIFICATIONS 76-02-014G...
Need help?
Do you have a question about the FM4850 and is the answer not in the manual?
Questions and answers