PARADYNE CORPORATION

7112 T1 DSU/CSU

Card Type                   DSU/CSU
Chip Set                    Unidentified
I/O Options                 Serial port, RJ-45 UTP connector, network
                            interface via RJ-48 connector,

                            power jack, DTE ports (2)
Wiring Type                 RJ-45 Unshielded twisted pair

                            RJ-48 T1
Maximum Data Rate           56Kbps (64Kbps full duplex)
Data Modulation Protocol    LADS
Data Bus                    External

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                                CONNECTIONS

         Function            Label            Function            Label

  Power Jack                  CN1      Network interface via       CN5
                                       RJ-48 connector

  DTE port (25-pin serial     CN2      Monitor connector -         CN6
  port)                                line in

  RJ-45 UTP connector         CN3      Monitor connector -         CN7
                                       line out

  DTE port (V.35              CN4
  connector)

                             DIAGNOSTIC LED(S)

   LED       Color       Status                   Condition

    OK       Green         On                DSU/CSU power is on

    OK          Green      Off        DSU/CSU power is off, performing a
                                       self test, or detecting a system
                                                   failure

   FAIL       Red          On         DSU/CSU is performing a self test,
                                        or detecting a system failure

   FAIL       Red          Off         DSU/CSU is not performing a self
                                     test, or detecting a system failure

   TST      Yellow         On            DSU/CSU is executing a test

   TST          Yellow     Off         DSU/CSU is not executing a test

   SIG       Green         On         A recoverable signal is detected on
                                                   network

   SIG          Green      Off       Network signal can not be recovered.

   OOF      Yellow         On        DSU/CSU is detecting an out of frame
                                                  condition

   OOF      Yellow         Off        DSU/CSU is not detecting an out of
                                               frame condition

   ALM      Yellow         On            DSU/CSU has detected an alarm
                                             condition on network

   ALM      Yellow         Off           DSU/CSU has detected an alarm
                                             condition on network

   EER      Yellow         On         Excessive error rate threshold has
                                           been exceeded on network

   EER      Yellow         Off        Excessive error rate threshold has
                                         not been exceeded on network

   TXD       Green         On          Receiving all zeros from the DTE

   TXD       Green         Off         Receiving all ones from the DTE

   TXD       Green      Blinking          Data is being transferred

   RXD       Green         On        Transmitting all zeros from the DTE

   RXD       Green         Off        Transmitting all ones from the DTE

   RXD       Green      Blinking          Data is being transferred

   RTS       Green         On                 RTS signal is high

   RTS       Green         Off                RTS signal is low

   CTS       Green         On                 CTS signal is high

   CTS       Green         Off                CTS signal is low

   DTR       Green         On                 DTR signal is high

   DTR       Green         Off                DTR signal is low