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ATL User Guide
OM25 O

Optical M

Modem

20

The CAS multiframe may be enabled or disabled. When enabled, validation of the incoming CAS
multiframe signal in TS16 is performed. The outgoing TS16 contains a generated multiframe
incorporating idle signal codes. There is no processing of signalling data.

Individual timeslots may be selected for transmission using the DS0 selection page on the VT100
screen, however this function cannot be accessed using the front panel.

TS0 is always selected; it is either regenerated by the OM25 or passed transparently (inverted) in
both directions. It is possible to have different timeslots configured at the two ends for mixed
timeslot mapping.

5.2.3

PERFORMANCE

The following performance attributes may be viewed on the VT100 User Performance screen:

Errored Seconds

Severely Errored Seconds

Unavailable Seconds

Severely Errored Frame Seconds

Line Errored Seconds

These are derived from RFC2495, the E1 MIB definition document.

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Содержание OM25

Страница 1: ...OM25 USER GUIDE...

Страница 2: ...elecom Ltd and may not be disclosed or reproduced in whole or in part without their written consent ATL Telecom Ltd 2004 Note The information contained in this document is supplied without liability f...

Страница 3: ...ment Electrostatic discharge ESD Warning Antistatic precautions should be observed at all times Power Rating Information AC unit Voltage Range 85V 250V Current Range 50mA Frequency Range 50 60Hz Power...

Страница 4: ...sed environment if one or more conditions for an unexposed environment are not fulfilled Unexposed Environment A TELECOMMUNICATIONS NETWORK is considered to be an unexposed environment if the followin...

Страница 5: ...3 TERMINAL PORT 12 3 2 REAR PANELS 12 3 2 1 DC VARIANT 12 3 2 2 AC VARIANTS 13 3 2 3 REAR CONNECTORS COMMON TO AC DC VARIANTS 13 4 INSTALLATION 14 4 1 PROTECTIVE EARTH 14 4 2 POWER ON SEQUENCE 14 4 3...

Страница 6: ...ENS 25 6 3 2 INFORMATION SCREEN 26 6 3 3 CONFIGURATION SCREENS 27 6 3 3 1 ENTERING INFORMATION 27 6 3 3 2 MOVING BETWEEN CHECK BOXES 27 6 3 3 3 TURNING FUNCTIONS ON AND OFF 27 6 3 3 4 HOW RADIO BUTTON...

Страница 7: ...VIA THE FRONT PANEL BUTTONS 51 7 1 INTRODUCTION 51 7 2 OPERATION 51 7 2 1 GENERAL 52 7 2 2 G 703 OPTIONS 53 7 2 3 V 35 OPTIONS 54 7 3 KEYPAD LOCK 54 7 4 AUXILIARY PORT OPERATION 54 8 SPECIFICATIONS 55...

Страница 8: ...2 G 703 75 OHM INTERFACE 58 8 7 3 V 35 INTERFACE 59 8 7 4 V 35 EXTERNAL TIMING ADAPTOR CABLE PINOUT 60 8 8 TERMINAL CONNECTION 61 8 9 ENVIRONMENTAL 62 8 9 1 TRANSPORTATION 62 8 9 2 STORAGE 62 8 9 3 O...

Страница 9: ...ng a single V35 or G703 interface to the user It delivers framed unframed E1 fractional E1 and N 64kbps services Protocol conversion e g G 703 at the CO and V 35 at the CPE is handled automatically Th...

Страница 10: ...r the other as slave The master unit is the source of link management and is able to configure and monitor the slave settings but not vice versa Either master or slave can be set to be CO A simple poi...

Страница 11: ...al connection eight status LEDs and three front panel buttons Figure 4 Front Panel 3 1 1 LEDS 3 1 1 1 STATUS Red An urgent alarm is present in the system Amber A non urgent alarm is present in the sys...

Страница 12: ...buttons on the front of the OM25 Local Loop Loop Back and Remote Loop In Normal mode the buttons can be used to setup various test loops In Programming mode the buttons are used to configure the OM25...

Страница 13: ...tors 3 2 3 REAR CONNECTORS COMMON TO AC DC VARIANTS Optical Connector depending on variant User Data Ports depending on variant OM25 Long Haul G 703 75 ohms FC PC 2 BNC OM25 Long Haul G 703 120 ohms F...

Страница 14: ...afety Statements at the front of this User Guide 4 2 POWER ON SEQUENCE The power up sequence will begin after power is applied Desktop units require a 48V dc or 110 230V ac input depending on the vari...

Страница 15: ...lied set with the following default settings General Mode Slave CPE User Port Rate n 32 2048kbps V 35 Interface Enable Loops Enabled End to End Signalling Off Circuits 106 107 109 On Timing Loop G 703...

Страница 16: ...smitted across the link Their states are only relevant to the local unit 5 1 3 SIGNALLING CIRCUIT OPTIONS 106 Normal Set On 107 Normal Set On 109 Normal Set On Circuits 106 107 and 109 can act accordi...

Страница 17: ...em is used to denote the state of the appropriate signal at the remote end For 106 Set On 106 is ON in all cases This is the factory default When 106 is following 105 there is a delay of 16ms in the O...

Страница 18: ...ng Each modem receives timing from its terminal and passes it to the far end Fig 9 Through timing 5 2 1 2 LOCAL TIMING In Local timing mode the clock source inside the CO is the reference clock for th...

Страница 19: ...of Signal LOS 5 2 2 2 STRUCTURED MODE In structured mode the modem aligns to the incoming G703 frame from the terminal and extracts the data from the selected timeslots It also generates a G703 frame...

Страница 20: ...e on the VT100 screen however this function cannot be accessed using the front panel TS0 is always selected it is either regenerated by the OM25 or passed transparently inverted in both directions It...

Страница 21: ...or Tera Term to 19 200 baud 8 bits no parity 1 stop bit and Xon Xoff The following screen will be displayed once the the OM25 has completed its power on sequence Press the spacebar to display the Log...

Страница 22: ...This is a limited access mode that only allows the user to view the current status of the unit To access this mode press R then return to enter this mode The Screen will now prompt you to enter a pass...

Страница 23: ...25 18 Main Menu Urgent Alarm On Non Urgent Alarm Off A Alarms C Configuration I Information L Logout P Performance S Security T Test Type selection F1 Help OOOOOOO MM MM 22222 5555555555 OOOOOOOOOOO...

Страница 24: ...to return to the main menu If the monitoring mode has been set to off default setting then the following message will be displayed for around 5 seconds before the screen reverts to the initial OM25 sc...

Страница 25: ...N SCREENS Pressing the appropriate key activates its associated menu There is no need to press return In fact pressing return will in most cases have the undesired effect of exiting the selected scree...

Страница 26: ...ave unit can only view its local information OM25 Thu 01 Jan 1970 00 03 33x Performance Optical Urgent Alarm On Non Urgent Alarm On Subsystem Slave View Local Statistics Table ES SES UAS BBE Time Elap...

Страница 27: ...he return key to accept the configuration Note The configuration is not accepted until the return key is pressed In this way mistakes can be corrected before the data is entered Beware though if you e...

Страница 28: ...f three possible options Full Control Loops Only or Disabled It would not make sense to set it to be both Full Control and Disabled at the same time so we only allow one of the three options to be set...

Страница 29: ...ation Configure User Port System Subsystem Names Monitoring Reboot Serial Communications Front Panel Allows you to reboot the system Set date time and menu timeout Enter name description and location...

Страница 30: ...he acknowledgement fix the fault then clear F5 the alarm OM25 Fri 02 Jan 1970 01 24 51 Alarm Status Urgent Alarm On Non Urgent Alarm Off Display Filters Level 1 2 X 3 X 4 X 5 X Status Off Update X No...

Страница 31: ...t alarms Status Off Update X To turn off automatic updates of this screen Use the cursors to select the Status Off Update X field Pressing the space bar toggles the setting The screen will not update...

Страница 32: ...Name Toggles the subsystem display field between name and ID F5 Clear History Removes ALL entries from the fault log OM25 Thu 01 Jan 1970 00 02 45 Alarm History Urgent Alarm On Non Urgent Alarm Off Di...

Страница 33: ...n A description of the alarm The ON suffix indicates the recorded time and date the alarm went active OFF indicates when the alarm became inactive Records the exact time the event occurred Records the...

Страница 34: ...on Urgent Alarm On Non Urgent Alarm On Management Mode Master Slave Independant DSL Gender Co Cpe Manangement Mode changes will cause unit to reboot F1 Help F3 Previous Menu F4 Main Menu Configuration...

Страница 35: ...ance monitoring history is saved at the master When the management terminal is connected to the master it can read all of the information from the local and remote units whereas when the management te...

Страница 36: ...ter Port Type OM25 V35 Rate nx64 32 Enable Loops Timing Control Lines Internal 106 Clamp On External 107 Clamp On Loop 109 Clamp On End to end Signalling Press Return to Accept or Escape to Cancel F1...

Страница 37: ...Port Urgent Alarm On Non Urgent Alarm On Subsystem Master Unit Type OM25 G703 75 Ohm Timing Framing TS0 Control Through E1Unframed Regenerated Local E1 Inverted Loop E1Crc E1Mf Channelisation E1CrcMf...

Страница 38: ...t or Escape to Cancel F1 Help F3 Previous Menu F4 Main Menu Use TAB to select fields Configuration Master Slave User Port Master slave configuration Configure User Port System Subsystem Names Monitori...

Страница 39: ...onfiguration System Urgent Alarm On Non Urgent Alarm Off Date 01 01 1970 Time 24Hr 00 28 Inactive Time Out min 30 Press Return to Accept or Escape to Cancel F1 Help F3 Previous Menu F4 Main Menu Confi...

Страница 40: ...ystem Names Urgent Alarm On Non Urgent Alarm Off Subsystem No 1 Name Slave Description Unknown Location Unknown Press Return to Accept or Escape to Cancel F1 Help F3 Previous Menu F4 Main Menu Configu...

Страница 41: ...per fault Over time a complete list of faults will be seen OM25 Thu 01 Jan 1970 00 52 52 Configuration Monitoring Urgent Alarm On Non Urgent Alarm Off Monitoring Mode Report Faults With Warning Bell...

Страница 42: ...be left continuously connected to the master or slave after the operator has logged out This mode may then be used to register the indication of alarms externally The dumb terminal may be used to repo...

Страница 43: ...ss Return to Accept or Escape to Cancel F1 Help F3 Previous Menu F4 Main Menu F5 Default Configuration Master Slave User Port Master slave configuration Configure User Port System Subsystem Names Moni...

Страница 44: ...er if the new screen is not displayed correctly you may have to reset your local terminal b If the characters still appear corrupt then choose a lower baud rate Description Speed at which characters a...

Страница 45: ...ent Alarm Off Subsystem Slave Front Panel Buttons Full Control Loops Only Disabled Press Return to Accept or Escape to Cancel F1 Help F3 Previous Menu F4 Main Menu Configuration Master Slave User Port...

Страница 46: ...ersion number for the software being run Booter version Displays the version number for the boot strap loader Firmware version Displays the version number for the firmware OM25 Thu 01 Jan 1970 02 42 1...

Страница 47: ...when no SES have occured OM25 Thu 01 Jan 1970 00 03 33x Performance Optical Urgent Alarm On Non Urgent Alarm On Subsystem Slave View Local Statistics Table ES SES UAS BBE Time Elapsed Current 0 0 212...

Страница 48: ...s optical link has suffered from framing errors LES Line errored seconds Total line errored seconds OM25 Thu 01 Jan 1970 00 26 33 Performance USER Urgent Alarm On Non Urgent Alarm On Subsystem Slave V...

Страница 49: ...the system When the password is recognised on entry of the final password character the password field is enabled This field always displays its contents as asterisks and has a maximum length of 10 c...

Страница 50: ...s the traffic back to the optical line V 54 Remote Loop Sets a loopback on the remote unit OM25 Thu 01 Jan 1970 05 22 45 Test Loopbacks Urgent Alarm On Non Urgent Alarm Off Subsystem Slave Local Loop...

Страница 51: ...l controls have been previously set to Loops only or Input disabled from the VT100 Front Panel configuration screen it will not be possible to enter Programming Mode 7 2 OPERATION The Local Loop butto...

Страница 52: ...CO User Port Rate 2 n 2 128kbps User Port Rate 3 n 4 256kbps User Port Rate 4 n 8 512kbps User Port Rate 5 n 10 640kbps User Port Rate 6 n 12 768kbps User Port Rate 7 n 16 1024kbps User Port Rate 8 n...

Страница 53: ...ameter Value 0010 0000 0001 0000 0001 0010 Parameter Number 3 4 Meaning Timing Loop Timing Through Timing Local Unframed E1 CRC disabled E1 CRC enabled RL 1 0 LB 1 0 LL 0 1 0011 0100 E1 CAS CRC disabl...

Страница 54: ...sport an RS 232 link transparently across the fibre path independently from the main data payload Repeating this action converts the port back to its management function the 3 left most LEDs flash red...

Страница 55: ...epend upon to optical fibre used The better the quality of fibre the further the range achieved Typical figures given below Loss budget Long Haul 31dB Short Haul 16dB 8 3 AC POWER INLET AC power is fe...

Страница 56: ...m CGND to earth is required for ESD protection of the unit Mating connector Molex Minifit Junior Receptacle Molex Part Number 39 01 4031 Molex female contact Molex Part Number 39 00 0039 8 5 DC MAINS...

Страница 57: ...al wipe The optical connector on the unit must be cleaned by blowing clean oil and dust free compressed air down the centre of the optical connector 8 6 3 FC PC CONNECTOR This connector is more common...

Страница 58: ...This type if plug is fitted with an anti pull out feature this prevents the accidental removal of the plug from the connector SC Connector 8 7 INTERFACE CONNECTIONS 8 7 1 G 703 120 OHM INTERFACE The G...

Страница 59: ...ription Receive Data Common Return Transmit Data Request To Send Ready For Sending Data Set Ready Received Signal Detector Terminal Signal Element Timing Transmitter Signal Element Timing Receiver Sig...

Страница 60: ...8 7 4 V 35 EXTERNAL TIMING ADAPTOR CABLE PINOUT CCITT circuit Timing Source DCE Timing Sink DTE CCITT circuit 103 A P R 104 A 103 B S T 104 B 104 A R P 103 A 104 B T S 103 B 105 C F 109 109 F C 105 11...

Страница 61: ...or on the front panel The socket is wired to allow a straight connection to a PC serial port The serial port setting is 19200 baud 8 bits no parity 1 stop bit and Xon Xoff flow control The RS232C inte...

Страница 62: ...Humidity 5 to 95 non condensing 8 9 2 STORAGE ETS 300 019 1 1 Class 1 1 Storage in a totally weatherproof and partially temperature controlled environment in its standard packaging Temp range 5 to 45...

Страница 63: ...OM25 short Haul G 703 120 ohms 1 356 213 9 2 OM25 DC POWERED Description Order Number OM25 Long Haul V 35 1 356 121 OM25 Long Haul G 703 75 ohms 1 356 122 OM25 Long Haul G 703 120 ohms 1 356 123 OM25...

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