ASCEND COMMUNICATIONS, INC.

MULTIBAND PLUS T1/PRI

Card Type                  T1 CSU
Chip Set                   Unidentified
I/O Options                AC power connector, power switch, serial port,

                           T1 network interface via RJ-48 connector (2),
                           Alarm relay terminal block, palmtop port via
                           RJ-12 connector (2), data port via 44-pin
                           connector (4)
Wiring Type                RJ-48 shielded twisted pair
T1 Transfer Rate           1.544Mbps
T1 Protocol                AMI, B8ZS
Frame type                 D4, ESF
Data Bus                   External

[Image]

                                CONNECTIONS

         Function             Label            Function            Label

  AC power connector           CN1     44-pin DTE port 3            CN7

  Serial port                  CN2     44-pin DTE port 4            CN8

  44-pin DTE port 1            CN3     RJ-48 network interface      CN9
                                       - line 1

  RJ-12 palmtop connector      CN4     RJ-48 network interface     CN10
                                       - line 2

  RJ-12 palmtop connector      CN5     Alarm relay terminal        CN11
                                       block

  44-pin DTE port 2            CN6     Power                        SW1

                             DIAGNOSTIC LED(S)

  LED         Color          Status                 Condition

   PW         Green            On                  Power is on

   PW            Green         Off                 Power is off

   ER             Red          On             Self test in progress

   ER             Red       Blinking      Device is not functional due to
                                                  fault or error

   ER             Red          Off             Device is functional

   P1         Green            On              Channel 1 is active

   P1            Green      Blinking     CSU is in diagnostic mode. BERT,
                                          auto-BERT, remote loopback, or
                                         local loopback test in progress

   P1            Green         Off            Channel 1 is inactive

   P2         Green            On              Channel 2 is active

   P2            Green      Blinking     CSU is in diagnostic mode. BERT,
                                          auto-BERT, remote loopback, or
                                         local loopback test in progress

   P2            Green         Off            Channel 2 is inactive

   P3         Green            On              Channel 3 is active

   P3            Green      Blinking     CSU is in diagnostic mode. BERT,
                                          auto-BERT, remote loopback, or
                                         local loopback test in progress

   P3            Green         Off            Channel 3 is inactive

   P4         Green            On              Channel 4 is active

   P4            Green      Blinking     CSU is in diagnostic mode. BERT,
                                          auto-BERT, remote loopback, or
                                         local loopback test in progress

   P4            Green         Off            Channel 4 is inactive

  LS1             Red          On        Loss of synchronization detected
                                                on network line 1

  LS1             Red          Off          Loss of synchronization not
                                            detected on network line 1

  RA1             Red          On          Improper receive signal or no
                                          signal detected on network line
                                                        1

  RA1             Red          Off         Improper receive signal or no
                                          signal detected on network line
                                                        1

  1S1           Yellow         On         Blue alarm condition detected.
                                           All ones (AIS) received from
                                                     network

  1S1           Yellow         Off           Blue alarm condition not
                                            detected on network line 1

  RL1           Yellow         On            Device in line 1 loopback
                                                 diagnostic mode

  RL1           Yellow         Off         Device not in line 1 loopback
                                                 diagnostic mode

  LL1          Unidentified    Off                   Not used

  LA1            Green         On            Link is active on line 1

  LA1            Green      Blinking      Device unable to establish line
                                            1 communications, possible
                                               configuration error

  LA1            Green         Off               Link is inactive

  LS2             Red          On        Loss of synchronization detected
                                                on network line 2

  LS2             Red          Off          Loss of synchronization not
                                            detected on network line 2

  RA2             Red          On          Improper receive signal or no
                                          signal detected on network line
                                                        2

  RA2             Red          Off         Improper receive signal or no
                                          signal detected on network line
                                                        2

  1S2           Yellow         On         Blue alarm condition detected.
                                           All ones (AIS) received from
                                                     network

  1S2           Yellow         Off           Blue alarm condition not
                                            detected on network line 2

  RL2           Yellow         On            Device in line 2 loopback
                                                 diagnostic mode

  RL2           Yellow         Off         Device not in line 2 loopback
                                                 diagnostic mode

  LL2          Unidentified    Off                   Not used

  LA2            Green         On            Link is active on line 2

  LA2            Green      Blinking      Device unable to establish line
                                            2 communications, possible
                                               configuration error

  LA2            Green         Off           Link is inactive. Line 2
                                                     disabled