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CONFIGURING THE FM4900

29

76-02-011F

Figure 6. 12 FM4900 Clocking diagram

6 . 4. 4 Datalink

The

DATALINK

facility is only available in G.751 Framed mode. It enables you to control and

monitor statistics from the remote FM4900. The options are

ON

or

OFF

.

When

DATALINK

is set to

ON,

The National bit (Bit 12 of the framing overhead described in

Section 3) is used to provide 22

.

375 Kbit/sec of datalink bandwidth. When

OFF

the National

bit is set to 1.

Line Port

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Summary of Contents for FM4900

Page 1: ...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 011F website www metrodata co uk Metrodata FM4900 User M...

Page 2: ......

Page 3: ...r merchantability or fitness for any particular purpose Further Metrodata Ltd reserves the right to revise this publication and to make changes from time to time in the content hereof without obligati...

Page 4: ......

Page 5: ...10 4 3 Power Supply 10 4 4 Remote Management port 11 4 5 Alarm Extension 11 4 6 Terminal Port 12 4 6 1 Minimum RS232 connection 13 4 6 2 V 24 Terminal Cable 25 Way to 25 Way 13 4 6 3 Connecting to a P...

Page 6: ...5 Event Logs 34 6 9 Performance Data 35 6 10 Unit Set up Checklist 36 7 ANALYSING PERFORMANCE 37 7 1 Introduction 37 7 2 Errors and Alarms 37 7 2 1 Error types 37 7 2 2 E3 Port Alarm responses 37 7 2...

Page 7: ...rnal loop control 51 9 2 DTE interface 52 9 2 1 DTE Loop 52 9 2 2 DTE External Loop 53 9 3 Network Interface NI 54 9 3 1 NI Remote Loop 54 9 3 2 NI Local Loop 55 9 3 3 Remote management during testing...

Page 8: ......

Page 9: ...ons including major and minor alarms and bit errors is kept for the last 24 hours Statistics are recorded every 15 minutes and processed into G 821 format Ninety six 15 minute periods are kept which m...

Page 10: ...INTRODUCTION 76 02 011F 2 1 2 Typical FM4900 Installation Figure 1 1 FM4900 typical deployment E3 LINK FM4900 HSSI ROUTER WAN FM4900 E3 LINK HSSI ROUTER...

Page 11: ...talling Setting up takes you through the basic steps of connecting the FM4900 to the external devices that you may have The structure of the menus is described in Section 6 Configuring the FM4900 as w...

Page 12: ...s that the option leads to another menu from which further options may be chosen Screen displays that contain variable information such as the current date or time show the variable in italics surroun...

Page 13: ...ectromagnetic Compatibility In order to ensure EMC compliance all signal and data cables and connectors must use a screened connector shell with a screened cable The cable screen must be terminated to...

Page 14: ...inside the unit and the cover should not be removed by unqualified personnel The unit must not be exposed to damp or condensing conditions The FM4900 must be connected to safety earth for correct ope...

Page 15: ...d with high density binary 3 HDB3 code words to ensure pulse density and therefore clocking information and an average DC potential of 0V The transmission rate is 34 368 Mbps 3 2 G 751 Framing Groups...

Page 16: ...TECHNICAL OVERVIEW 76 02 011F 8...

Page 17: ...t the time and these are described in Figure 4 2 below Figure 4 2 Front panel alarms LED Colour Meaning Power Red Mains power is being received Line Major Minor Red Yellow LOS LOF or SQ alarm is prese...

Page 18: ...socket is fitted to the rear panel and a plug is provided with the unit for the customer s own wiring The connections are labelled on the rear panel of the unit On some units an additional Ground stu...

Page 19: ...rt layout 4 5 Alarm Extension 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 FM4900 to a r...

Page 20: ...erminal port needs to be correctly driven otherwise the user will be permanently logged out of the DSU To drive the RTS correctly a fully configured cable can be used together with a terminal that sup...

Page 21: ...without a modem may have the minimum RS232 connection when this is suitable for the terminal being used as shown below Figure 4 9 Local terminal cable pinout Note To inhibit the modem control functio...

Page 22: ...9 pin COM port The connections are given in the figure below Figure 4 11 Terminal port converter cable 25 way to 9 way Notes To inhibit the modem control function for reasons explained earlier in thi...

Page 23: ...or should be used for connections to this port Note The HSSI port is regarded as a SELV port within the scope of EN 41003 Figure 4 12 HSSI port connector layout VEPin No VE Pin No Function CCT No 1 26...

Page 24: ...of the cables attached to the network port must not exceed 6dB when measured at 17 184 MHz The frequency attenuation characteristic of the cables attached to the network port shall follow a root frequ...

Page 25: ...2m of cable connecting the two Step 3 WAN Connect the WAN by means of the two BNC bayonet connectors on the rear panel of the unit Note Before connecting the network port make sure that you have read...

Page 26: ...word you can change any parameters that are not defined as read only The default operator password is the same as the model number i e FM4900 When you have entered this once you will be able to change...

Page 27: ...TTY display is shown below Figure 5 3 TTY Main set up menu When you press a letter which leads to a further menu the screen will scroll up and the new menu will be displayed The highlighted menu item...

Page 28: ...l be refreshed without scrolling displaying the new menu The highlighted menu item REMOTE LOGON only appears on the screen when G 751 Framed mode is selected and DATALINK is enabled The item MANAGEMEN...

Page 29: ...he FM4900 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 The default terminal is a Teletype TTY but the vast majori...

Page 30: ...INSTALLING SETTING UP 76 02 011F 22...

Page 31: ...y seeks to logon to the local node as described in section 5 2 Pressing the escape key on any screen will return you to the previous screen in the structure Time Date Nodename Password Telnet timeout...

Page 32: ...extension Selecting the menu item ALARM EXTENSION on the MAIN SET UP menu leads to a further menu Figure 6 3 Alarm extension screen MAIN SET UP alarm eXtension menu General set up menu WAN port set up...

Page 33: ...larms are labelled from 0 to 9 and A to Z in the firmware and can be selected by their label Framed mode alarms Unframed mode alarms Figure 6 5 NI Port alarm config Note When in UNFRAMED mode AIS only...

Page 34: ...current date in the format dd mm yyyyy For example April 4th 2001 would be entered as 4 4 2001 The corresponding day of the week is also displayed when you press enter Leading zeros are suppressed by...

Page 35: ...ill accept either upper or lower case or a mixture of both when you next log on Figure 6 10 Password prompt For security the characters you type are displayed on the screen as asterisks You will also...

Page 36: ...employed in the FM4900 and the values are INTERNAL and LOOP The E3 Line TX clock is derived from the DTE using CCT 113 TT terminal timing The HSSI specification requires this signal to be a non gated...

Page 37: ...le in G 751 Framed mode It enables you to control and monitor statistics from the remote FM4900 The options are ON or OFF When DATALINK is set to ON The National bit Bit 12 of the framing overhead des...

Page 38: ...s one of those below depending on which of the two units is selected either or Figure 6 13 Datalink screens We advise that each unit be given a unique node name to make identification easier To logout...

Page 39: ...for information only 6 5 2 CA This controls the CA Control Available signal It can be set to ON OFF or THROUGH When set to THROUGH the control signal reflects the current state of the E3 receive port...

Page 40: ...200 baud 6 6 3 Parity Parity may be set to NONE ODD or EVEN 6 6 4 Data bits The number of data bits may be 7 or 8 6 6 5 Stop bits The number of stop bits may be 1 or 2 6 6 6 Modem support Modem suppor...

Page 41: ...t 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 FM4900 This is provided for information only 6 8 2 Hardware v...

Page 42: ...fter a cold start Section 5 shows the FM4900 s default settings 6 8 5 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...

Page 43: ...been taken remotely without the knowledge of the local user of a node Figure 6 19 Config event log 6 9 Performance Data This option gives you access to the FM4900 s performance monitoring functions T...

Page 44: ...Check the current time and date and change them if necessary as already described Check the nodename of the local FM4900 and change it if necessary Check the Operator Password and change it if necessa...

Page 45: ...ting the ALARM EXTENSION CLEAR ALARM OUTPUTS option from the MAIN SET UP menu After the alarm has been cancelled as above it is still indicated on the front panel indicators and in the performance sta...

Page 46: ...s section of the Performance reports summaries in Framed mode or if AIS has been ENABLED in Unframed mode b The CLEAR ALL DATA option clears the complete performance statistics database This may be ne...

Page 47: ...in 103 errors UAS Unavailable seconds declared after SES for 10 consecutive seconds DM Degraded minutes 1 in 106 errors minute Alarms Definition LOS Loss Of Signal No data and therefore no clocking in...

Page 48: ...d 15 minute summaries These modes are described in the subsections below describing reports and summaries Reports and summaries are dealt with separately since they have different characteristics The...

Page 49: ...of 6 I FAS Errors Alarmed seconds Period Starting Count Valid EF ES BES SES UAS DM Valid LOS LOF AIS RAI SQ 14 09 23 0 900 0 0 0 0 0 0 900 0 0 0 0 0 14 24 23 0 900 0 0 0 0 0 0 900 0 0 0 0 0 14 39 23...

Page 50: ...e is added to the printout every 15 minutes Figure 7 8 Rolling report screen Metrodata FM4900 Local connection to nodename NI Interface 1 of 6 I FAS Errors Alarmed seconds Period Starting Count Valid...

Page 51: ...atic Updated and 15 minute displays The Current 15 mins column gives the error counts for the current partial 15 minute period Therefore the duration of statistics within this column varies between 0...

Page 52: ...s which have a fixed style The SUMMARY STYLE option only shows on the menu when a SUMMARY has been selected in the DISPLAY MODE The styles available are Figure 7 9 Summary styles Counts Errors and ala...

Page 53: ...in the Temporary Counts column only It may be best to confirm an alarm situation by setting the summary screen to G 821 style when an alarm is present Metrodata FM4900 Local connection to nodename 13...

Page 54: ...tion The definition of G 821 as parameters per second gives a different summary layout than that for Counts style In Counts style an event is recorded once only Metrodata FM4900 Local connection to no...

Page 55: ...urrent Alarms None Diag None Temporary Current Previous Last Counts 15 mins 15 mins 24 hours Alarmed time Total secs 856 510 900 86400 LOS 00 0000 00 0000 00 0000 00 0000 LOF 0 0000 0 0000 0 0000 0 00...

Page 56: ...ANALYSING PERFORMANCE 76 02 011F 48...

Page 57: ...be accessed remotely by using a Network Management System NMS connected to the LAN The NMS should use SNMP Simple Network Management Protocol and could be located on the local LAN or on a remote LAN c...

Page 58: ...shown here to indicate its forthcoming availability For further information on the management interface and the MIB definition refer to the LM1100 SNMP Enabler user manual The MIB definitions support...

Page 59: ...Figure 9 1 Testing menu The interface to be tested and the type of test to carry out are selected using this screen Definitions of the menu items are given below 9 1 1 DTE When DTE is selected you can...

Page 60: ...e The signal from the remote DTE passes through both the FM4900 s and is looped adjacent to the local FM4900 s DTE port This therefore validates a the local DTE cable without the effect of the FM4900...

Page 61: ...ates the E3 link both FM4900 s and both sets of DTE cables if the remote DTE recognises its own signals Note that if EXTERNAL LOOP CONTROL is DISABLED the remote loop code receiver in the DSU is inhib...

Page 62: ...eated 100 The Loop Up code is transmitted for 5 5 seconds with the remote FM4900 going into Loop after 4 5 seconds The remote FM4900 stays in this mode until Loop Down is transmitted from the local un...

Page 63: ...lines LA and LB These loops may also be activated from the TESTING menu b The DTE EXTERNAL LOOP may only be activated via the TESTING menu 9 3 3 Remote management during testing Care must be taken wh...

Page 64: ...nd verify the DTE Links If the MINOR alarm LED is on check that the Bridges Routers are switched on If the MINOR alarm LED remains on check that the DTE connections are in place and secure If the MINO...

Page 65: ...ote loop Display Style Counts G 821 percent G 821 Error type FAS G 751 mode Code errors Management V 24 terminal through terminal port SNMP through managementport Telnetthroughmanagementport Managemen...

Page 66: ...d to their default settings The table below lists the default values Option Default Node name This field cleared Password FM4900 Telnet Timeout 60 seconds Framing G 751 Timing Internal Datalink On CA...

Page 67: ...3 High Density Binary 3 LAN Local Area Network LOF Loss of Frame alarm LOS Loss of Signal alarm MIB Management Information Base NI Network Interface NMS Network Management System RAI Remote Alarm indi...

Page 68: ...FM4900 SPECIFICATIONS 76 02 011F 60...

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