PATTON ELECTRONICS COMPANY

2703-X.21

Card Type                E1 Modem
Chip Set                 Unidentified
I/O Options              AC power connector, 15-pin DTE connector,

                         BNC network connectors (2), RJ-45 network
                         connector
Maximum Data Rate        2.048Mbps
Data Bus                 External

[Image]

                                            CONNECTIONS

           Function                    Label                        Function                 Label

  Power connector                CN1    RJ-45 120Ohm twisted pair                  CN4
                                        connector

  X.21 DTE port (15pin           CN2    BNC 75Ohm coaxial connector                CN5
  connector)

  BNC 75Ohm coaxial connector    CN3    Power switch                               SW3

                        USER CONFIGURABLE SETTINGS

                 Setting                     Label          Position

  75Ohm transmit shield to ground             LK1            Closed

  120Ohm transmit shield to ground            LK1             Open

  75Ohm receive shield to ground              LK2             Open
  connection broken

  75Ohm receive shield to ground made         LK2       Closed (optional)

  Factory configured - do not alter           LK3             Open

  1200Ohm shield to ground broken             LK4             Open

  120Ohm shield to ground made                LK4       Closed (optional)

  Auto-sense enabled                          LK5            Closed

  Auto-sense disabled                         LK5             Open

  Device is master (clock generated          S1/1              On
  internally)

  Device is slave. (clock recovered from     S1/1             Off
  network)

  Loopback activated by front panel          S1/4             Off

  Continual loopback mode enabled            S1/4              On

  Data inversion disabled                    S1/5             Off

  Data inversion enabled                     S1/5              On

  Factory configured - do not alter          S1/6             Off

  Factory configured - do not alter          S1/7             Off

  Factory configured - do not alter          S1/8             Off

  Loopback test activated                     SW2              On

  Normal mode. Loopback test not              SW2             Off
  activated

                 LINE IMPEDANCE

          Setting              LK6       LK7

      75Ohm operation         Closed    Closed

      120Ohm operation         Open      Open

           RATE ADAPTATION

       Setting          S1/2    S1/3

       256Kbps           On      On

       512Kbps           Off     On

      1.024Mbps          On     Off

      2.048Mbps          Off    Off

                             DIAGNOSTIC LED(S)

   LED     Color     Status                    Condition

   PWR      Red       On                      Power is on

   PWR      Red       Off                    Power is off

   NET     Green      On              Network connection is good

   NET     Green      Off            Network connection is broken

   MCL     Green      On      Device is configured as a master clock unit

   MCL     Green      Off        Device is configured as a slave unit

   LOOP    Green      On         Device is conducting a loopback test

   LOOP    Green      Off      Device is not conducting a loopback test