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ATL OM25 User Manual

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OM25
USER GUIDE

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  • Page 1 OM25 USER GUIDE...
  • Page 2 ATL Part No 1/356/001/610 Issue: 03 Nov 2004 Disclaimer The information contained in this document is confidential to ATL Telecom Ltd. and may not be disclosed or reproduced in whole or in part without their written consent. © ATL Telecom Ltd 2004.
  • Page 3 Safety Statements classification - NON traffic ports The AC Mains input has a safety status of PRIMARY CIRCUIT The OM25 AC unit is defined as a class 1 equipment and must be connected to a reliable earth connection. If the mains earth cannot be guaranteed to be PROTECTIVE EARTH, then a PROTECTIVE EARTH conductor must be connected to the M3 stud on the rear panel of the unit.
  • Page 4 OM25 O O ptical M M odem The OM25 DC unit is defined as class II equipment, an EARTH conductor must be connected to the M3 stud on the rear panel of the unit when using the G.703 interface in accordance with ITU- T G.703 requirements.

  • Page 5: Table Of Contents

    ATL User Guide OM25 O O ptical M M odem INTRODUCTION EXAMPLE APPLICATIONS CONSTRUCTION FRONT PANEL 3.1.1 LEDS 3.1.1.1 STATUS 3.1.1.2 OPTICAL 3.1.1.3 INTERFACE 3.1.1.4 MASTER (GREEN) 3.1.1.5 TEST (RED) 3.1.1.6 LOOPS (AMBER) 3.1.2 BUTTONS 3.1.3 TERMINAL PORT REAR PANELS 3.2.1...
  • Page 6 ATL User Guide OM25 O O ptical M M odem 5.2.1.1 THROUGH TIMING 5.2.1.2 LOCAL TIMING 5.2.1.3 LOOP TIMING 5.2.2 FRAMING MODES 5.2.2.1 UNSTRUCTURED MODE 5.2.2.2 STRUCTURED MODE 5.2.3 PERFORMANCE CONFIGURATION VIA THE TERMINAL PORT LOGIN LOGOUT MENU SCREENS 6.3.1 NAVIGATION SCREENS 6.3.2...
  • Page 7 ATL User Guide OM25 O O ptical M M odem 6.6.7 SERIAL COMMUNICATIONS 6.6.7.1 PROCEDURE TO FOLLOW WHEN CHANGING SETTINGS 6.6.8 FRONT PANEL INFORMATION PERFORMANCE 6.8.1 PERFORMANCE OPTICAL LINES 6.8.2 PERFORMANCE USER PORT SECURITY 6.10 TEST CONFIGURATION VIA THE FRONT PANEL BUTTONS...
  • Page 8 ATL User Guide OM25 O O ptical M M odem INTERFACE CONNECTIONS 8.7.1 G.703 120 OHM INTERFACE 8.7.2 G.703 75 OHM INTERFACE 8.7.3 V.35 INTERFACE 8.7.4 V.35 EXTERNAL TIMING ADAPTOR CABLE PINOUT TERMINAL CONNECTION ENVIRONMENTAL 8.9.1 TRANSPORTATION 8.9.2 STORAGE 8.9.3...

  • Page 9: Introduction

    & 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. The OM 25 Long Haul version can transmit data typically up to 75km. The OM25 Short Haul version can transmit data typically up to 15km.

  • Page 10: Example Applications

    ATL User Guide OM25 O O ptical M M odem EXAMPLE APPLICATIONS Two OM25s may be linked via a dual fibre single mode optical link to provide end-to-end electrical interfaces, either of like type (ie G703 to G703) or of different type (G703 to V35). One of the units is configured as timing source (CO) , the other as timing sink (CPE).

  • Page 11: Construction

    PC. To do this, the front panel controls must be enabled for "Full Control" (default setting) and the unit set to Programming Mode, section 7. FRONT PANEL The front panel of the OM25 contains a RS232 9 way D-Type terminal connection, eight status LEDs and three front panel buttons Figure 4 Front Panel 3.1.1...

  • Page 12: Master (Green)

    3.1.2 BUTTONS There are three 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, refer to section 7.

  • Page 13: Ac Variants

    OM25 O O ptical M M odem 3.2.2 AC VARIANTS Ω Figure 6 OM25 AC G.703 120Ω Ω with FCPC Optical Connectors Figure 7 OM25 AC V.35 with SC Optical Connectors 3.2.3 REAR CONNECTORS COMMON TO AC & DC VARIANTS...

  • Page 14: Installation

    OM25 O O ptical M M odem INSTALLATION This chapter describes the basic steps that are required to set up a system using the OM25 Optical modem. It is recommended that if two desktop units are to be connected they should be tested back to back to check for operation before deployment.

  • Page 15: Default Settings

    ATL User Guide OM25 O O ptical M M odem DEFAULT SETTINGS The OM25 is supplied 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 Circuits 106, 107 &...

  • Page 16: Interfaces & Timing Options

    ATL User Guide OM25 O O ptical M M odem INTERFACES & TIMING OPTIONS V.35 INTERFACE 5.1.1 USER RATE User rates from 64K to 2304K (n = 1 to 36) can be configured; however, if the remote end is using G703, the maximum data rate at the V35 end is 2048K (n = 32).

  • Page 17: Enable Loops

    ATL User Guide OM25 O O ptical M M odem 5.1.5 ENABLE LOOPS When OFF, loop activation via control lines 140 and 141 is disabled. Also incoming V54 patterns from the fibre are ignored. This allows end to end loop activation in tandem sections. For example, the two modems connected by an adaptor cable in Fig 8 would have this option set to OFF, so that the far left-hand modem could set a remote loop on the far right-hand unit via V54.

  • Page 18: Interface

    ATL User Guide OM25 O O ptical M M odem G.703 INTERFACE 5.2.1 TIMING MODES There are three timing modes - Through, Local and Loop. 5.2.1.1 THROUGH TIMING Through mode is plesiochronous - the two directions have independent timing and can transfer at differing rates.

  • Page 19: Loop Timing

    ATL User Guide OM25 O O ptical M M odem 5.2.1.3 LOOP TIMING In Loop timing mode, the reference clock for the system is provided by the terminal (or network) connected to the CO. Timing G703 G703 looped Timing looped...

  • Page 20: Performance

    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.

  • Page 21: Configuration Via The Terminal Port

    CONFIGURATION VIA THE TERMINAL PORT LOGIN The OM25 can be configured via the terminal port on the front of the unit. Connect a VT100 terminal (or a PC running a Tera Term emulation program) to the 9-way Terminal port. Configure the serial port settings of the VT100 terminal or Tera Term to 19,200 baud, 8 bits, no parity, 1 stop bit and Xon/Xoff.
  • Page 22 Login (Configuration, Test, Read-Only) : You can now login using one of three modes Configuration Mode - Allows the user full access to configure the OM25. To access this mode press ‘C’ then <return> to enter this mode Test Mode - This is a limited access mode that only allows the user to setup test loops. To access this mode press ‘T’...
  • Page 23 ATL User Guide OM25 O O ptical M M odem OOOOOOO 22222 5555555555 OOOOOOOOOOO MMMM MMMM MM MM MM MM MMMM 55555555 OOOOOOOOOOO OOOOOOO 2222222222 555555 Login (Configuration, Test, Read-Only) : * Password : A help screen is now displayed explaining the operation required to set the various management fields.

  • Page 24: Logout

    Are you sure ? (y/N) 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 screen. Monitoring Mode is off.

  • Page 25: Menu Screens

    ATL User Guide OM25 O O ptical M M odem MENU SCREENS There are 3 types of menu screens; navigation screens that guide the user down through the menu topology, configuration screens that allow the user to turn functions ON and OFF, and information screens that provide information on the status of the unit.

  • Page 26: Information Screen

    ATL User Guide OM25 O O ptical M M odem 6.3.2 INFORMATION SCREEN This screen provides version, alarm and performance information about the system. It is particularly useful in helping locate problems. A master unit can view information about itself and about the remotely connected slave unit. A slave unit can only view its local information.

  • Page 27: Configuration Screens

    ATL User Guide OM25 O O ptical M M odem 6.3.3 CONFIGURATION SCREENS 6.3.3.1 ENTERING INFORMATION OM25 Fri 02 Jan 1970 17:47:10 Configuration > User Port Urgent Alarm:On Non-Urgent Alarm:Off Subsystem: Slave Port Type: OM25-V35 Rate (nx64): <32> Enable Loops:...

  • Page 28: How Radio Buttons Work

    ATL User Guide OM25 O O ptical M M odem For example: To disable a port – move the cursor to the check box, press the space bar and then press <return>. Enable Loops: Enable Loops: 6.3.3.4 HOW RADIO BUTTONS WORK These are multiple choice check boxes.

  • Page 29: Menu Structure

    ATL User Guide OM25 O O ptical M M odem MENU STRUCTURE The following table shows the top level and sub level menu structures. The proceeding pages will explain the operation of each option. Top Level Sub level Description Alarms Status Displays the current alarm status.

  • Page 30: Alarms

    ATL User Guide OM25 O O ptical M M odem ALARMS 6.5.1 ALARM STATUS SCREEN Alarms Status Displays the current alarm status. History Review the fault log. View recorded alarm events. OM25 Fri 02 Jan 1970 01:24:51 Alarm > Status...
  • Page 31 ATL User Guide OM25 O O ptical M M odem F10 Update This screen is set to automatically update by default. However if the Status = Off/Update field has been set to off, it may be necessary to update this screen manually by pressing F10.

  • Page 32: Alarm History Screen

    ATL User Guide OM25 O O ptical M M odem 6.5.2 ALARM HISTORY SCREEN Alarms Status Displays the current alarm status. History Review the fault log. View recorded alarm events. OM25 Thu 01 Jan 1970 00:02:45 Alarm > History Urgent Alarm:On...
  • Page 33 ATL User Guide OM25 O O ptical M M odem F9 Dump Produces a continual listing of the fault log. Useful when capturing to a file. F10 Update The screen is not updated in real time. Events that occur after first entering the screen are not displayed.

  • Page 34: Configuration

    F3 Previous Menu F4 Main Menu The OM25 unit default setting is as a slave. In order for a pair of units to operate correctly, one end must be set as a master, the other end as a slave. Normally the unit connected to the customer will be configured as a slave.
  • Page 35 ATL User Guide OM25 O O ptical M M odem The master unit is in charge of managing the optical link, it is also the 'master' from a network management point of view. It contains the database of configuration information for itself and the slave unit.

  • Page 36: User Port Configuration

    ATL User Guide OM25 O O ptical M M odem 6.6.2 USER PORT CONFIGURATION Configuration Master/Slave Master / slave configuration User Port Configure User Port Reboot Allows you to reboot the system System Set date, time and menu timeout Subsystem Names Enter name, description and location of this unit.

  • Page 37: G703 User Port

    ATL User Guide OM25 O O ptical M M odem 6.6.2.2 G703 USER PORT OM25 Thu 01 Jan 1970 00:01:15 Configuration > User Port Urgent Alarm:On Non-Urgent Alarm:On Subsystem: Master Unit Type: OM25-G703 75 Ohm Timing Framing: TS0 Control Through:...

  • Page 38: Reboot

    ATL User Guide OM25 O O ptical M M odem 6.6.3 REBOOT Configuration Master/Slave Master / slave configuration User Port Configure User Port Reboot Allows you to reboot the system System Set date, time and menu timeout Subsystem Names Enter name, description and location of this unit.

  • Page 39: System

    ATL User Guide OM25 O O ptical M M odem 6.6.4 SYSTEM Configuration Master/Slave Master / slave configuration User Port Configure User Port Reboot Allows you to reboot the system System Set date, time and menu timeout Subsystem Names Enter name, description and location of this unit.

  • Page 40: Subsystem Names

    ATL User Guide OM25 O O ptical M M odem 6.6.5 SUBSYSTEM NAMES Configuration Master/Slave Master / slave configuration User Port Configure User Port Reboot Allows you to reboot the system System Set date, time and menu timeout Subsystem Names Enter name, description and location of this unit.

  • Page 41: Monitoring

    ATL User Guide OM25 O O ptical M M odem 6.6.6 MONITORING Configuration Master/Slave Master / slave configuration User Port Configure User Port Reboot Allows you to reboot the system System Set date, time and menu timeout Subsystem Names Enter name, description and location of this unit.
  • Page 42 ATL User Guide OM25 O O ptical M M odem Should the VT100 terminal remain connected whilst logged out, and provided that certain options (in the Configuration > Monitoring Screen) have been set, warning messages indicating alarm conditions will be displayed. These warning messages may be accompanied by an audible beep.

  • Page 43: Serial Communications

    ATL User Guide OM25 O O ptical M M odem 6.6.7 SERIAL COMMUNICATIONS Configuration Master/Slave Master / slave configuration User Port Configure User Port Reboot Allows you to reboot the system System Set date, time and menu timeout Subsystem Names Enter name, description and location of this unit.

  • Page 44: Procedure To Follow When Changing Settings

    5.Press the <Escape> key. Notes: a) The OM25 tries to change baud rates smoothly. However 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.

  • Page 45: Front Panel

    ATL User Guide OM25 O O ptical M M odem 6.6.8 FRONT PANEL Configuration Master/Slave Master / slave configuration User Port Configure User Port Reboot Allows you to reboot the system System Set date, time and menu timeout Subsystem Names Enter name, description and location of this unit.

  • Page 46: Information

    ATL User Guide OM25 O O ptical M M odem INFORMATION Information Displays the designation of the unit. OM25 Thu 01 Jan 1970 02:42:19 Information Urgent Alarm:On Non-Urgent Alarm:Off Subsystem: Slave Unit Type: OM25-V35 Hardware Id: Issue A Mod Status: Mod 4 Booter Version: 0.0a 2004 04 05 AM29LV800T Boot...

  • Page 47: Performance

    ATL User Guide OM25 O O ptical M M odem PERFORMANCE Performance Optical Performance & Status of the optical lines. UserPort Performance & Status of the user port. 6.8.1 PERFORMANCE OPTICAL LINES OM25 Thu 01 Jan 1970 00:03:33x Performance > Optical...

  • Page 48: Performance User Port

    ATL User Guide OM25 O O ptical M M odem 6.8.2 PERFORMANCE USER PORT OM25 Thu 01 Jan 1970 00:26:33 Performance > USER Urgent Alarm:On Non-Urgent Alarm:On Subsystem: Slave View: Local Statistics Table | SES SEFS | | Time Elapsed...

  • Page 49: Security

    This field is enabled when the operator enters text into the password field This section deals with the security of the system. Access to the OM25 is password protected. All password characters are displayed as asterisks (*), with <RETURN> as the default password.

  • Page 50: Test

    ATL User Guide OM25 O O ptical M M odem 6.10 TEST Test Enables various loops OM25 Thu 01 Jan 1970 05:22:45 Test > Loopbacks Urgent Alarm:On Non-Urgent Alarm:Off Subsystem: Slave Local Loop : [ ] Loopback : [ ]...

  • Page 51: Configuration Via The Front Panel Buttons

    CONFIGURATION VIA THE FRONT PANEL BUTTONS INTRODUCTION For users that prefer to configure the OM25 without the need of a PC, the operating parameters can be configured using the front panel controls. Front panel programming is carried out by placing the unit into Programming Mode by pressing the "Local Loop"...

  • Page 52: General

    ATL User Guide OM25 O O ptical M M odem 7.2.1 GENERAL Parameter Parameter Meaning Number Value 0000 Slave (Default) 0001 Master CO 0010 Master CPE 0000 User Port Rate 1 (n=1, 64kbps) 0001 User Port Rate 2 (n=2, 128kbps)

  • Page 53: G.703 Options

    ATL User Guide OM25 O O ptical M M odem 7.2.2 G.703 OPTIONS Parameter Parameter Meaning Number Value 0000 Timing Through 0001 Timing Local 0010 Timing Loop 0000 Unframed 0001 E1, CRC disabled 0010 E1, CRC enabled 0011 E1 CAS, CRC disabled...

  • Page 54: Options

    ATL User Guide OM25 O O ptical M M odem 7.2.3 V.35 OPTIONS Parameter Parameter Meaning Number Value 0000 Enable Loops (Default) 0001 Disable Loops 0000 End to End Signalling Off (Default) 0001 End to End Signalling On 0000 Clamp 106 Off, 107 Off, 109 Off...

  • Page 55: Specifications

    ATL User Guide OM25 O O ptical M M odem SPECIFICATIONS DIMENSIONS The overall dimensions of the unit are: Height = 45mm Width = 165mm Depth = 185mm TRANSMISSION PERFORMANCE 8.2.1 JITTER To G.823 8.2.2 TRANSMISSION RANGE The range achieved will depend upon to optical fibre used. The better the quality of fibre the further the range achieved.

  • Page 56: Dc Power Inlet

    Molex Minifit Junior Receptacle Molex Part Number: 39-01-4031 Molex female contact Molex Part Number: 39-00-0039 -48V WHITE CGND BLACK DC MAINS CABLE The DC Power Cable can be ordered from ATL, ATL Part Number 6/910/000/423 (See ACCESSORIES). Stripped & 3,000mm Tinned White Black...

  • Page 57: Optical Connections

    ATL User Guide OM25 O O ptical M M odem OPTICAL CONNECTIONS 8.6.1 SAFETY WARNING Class 1 laser product. Exposure to the optical beam will not result in eye damage, however it is never advisable to look into the optical port or fibre. The laser light is invisible and prolonged exposure should be avoided as the human eye cannot respond to its presence.

  • Page 58: Sc Connector

    SC Connector INTERFACE CONNECTIONS 8.7.1 G.703 120 OHM INTERFACE The G703 120 Ohm connector on the OM25 is an 8-way RJ45 socket screen screen n.c. n.c. 8.7.2 G.703 75 OHM INTERFACE...

  • Page 59: Interface

    ATL User Guide OM25 O O ptical M M odem 8.7.3 V.35 INTERFACE Circuit Description A-wire B-wire Unbal Common Return Transmit Data Receive Data Request To Send Ready For Sending Data Set Ready Received Signal Detector Terminal Signal Element Timing...

  • Page 60: External Timing Adaptor Cable Pinout

    ATL User Guide OM25 O O ptical M M odem 8.7.4 V.35 EXTERNAL TIMING ADAPTOR CABLE PINOUT CCITT circuit Timing Source (DCE) Timing Sink (DTE) CCITT circuit 103-A 104-A 103-B 104-B 104-A 103-A 104-B 103-B 115-A 113-A 115-B 113-B...

  • Page 61: Terminal Connection

    ATL User Guide OM25 O O ptical M M odem TERMINAL CONNECTION A VT100 compatible terminal can be plugged into the 9-way D-type connector on the front panel. The socket is wired to allow a straight connection to a PC serial port.

  • Page 62: Environmental

    ATL User Guide OM25 O O ptical M M odem ENVIRONMENTAL 8.9.1 TRANSPORTATION ETS 300 019-1-2 Class 2.3 Transportation using normal public transport when stored in its normal transport packaging. Temp range -40 to +70°C Humidity +5 to +95% (non condensing) 8.9.2...

  • Page 63: Ordering Information

    ATL User Guide OM25 O O ptical M M odem ORDERING INFORMATION OM25 AC POWERED Description Order Number OM25 Long Haul V.35 1/356/111 OM25 Long Haul G.703 75 ohms 1/356/112 OM25 Long Haul G.703 120 ohms 1/356/113 OM25 Short Haul V.35 1/356/211 OM25 Short Haul G.703 75 ohms...

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