Controls on the rear panel

Layout of the rear panel can be seen in the following figure:

Connectors and controls on the rear panel are:

Pos: Symbol Description:
on the rear panel in the Manual
1 POWER Power switch
2 DC IN Power supply connector
3 AGND Ground connector
2048 kbit/s PCM_INTERFACE:
8 Tx PCMTA PCM_INTERFACE port 'A' output (balanced 120 Ohm)
9 Rx PCMRA PCM_INTERFACE port 'A' input (balanced 120 Ohm)
10 Tx PCMTA PCM_INTERFACE port 'A' output (unbalanced 75 Ohm)
11 Rx PCMRA PCM_INTERFACE port 'A' input (unbalanced 75 Ohm)
12 CLK PCMC PCM_INTERFACE external clock input (TTL)
13 Tx PCMTB PCM_INTERFACE port 'B' output (balanced 120 Ohm)
14 Rx PCMRB PCM_INTERFACE port 'B' input (balanced 120 Ohm)
15 Tx PCMTB PCM_INTERFACE port 'B' output (unbalanced 75 Ohm)
16 Rx PCMRB PCM_INTERFACE port 'B' input (75 Ohm connector)
VF-INTERFACE 2R:
17 AGND VF_INTERFACE ground
18 a VFRXA,VFRXB VF_INTERFACE input
19 b VF_INTERFACE input
20 e/c VF_INTERFACE input
21 f VF_INTERFACE input
22 E VF_INTERFACE input
23 M VF_INTERFACE input
HS-INTERFACE:
4 HS Handset connection (HS_INTERFACE) Connector: RJ11

Communication interfaces:
6 RS-232 serial (RS-232) communication interface
Connector: DB9P
The arrange of the connector: (DTE)

pin: Id.: Description
1 DCD input data carrier detect
2 RXD input data receive
3 TXD output data transmission
4 DTR output terminal ready
5 GND ground
6 DSR input modem ready
7 RTS output request to send
8 CTS input clear to send
9 --- input not used

7 EPP parallel (IEEE 1284) communication interface
Connector: 36 pole Amphenol socket
The arrange of the connector:

pin: IEEE 1284 signal:
1 -STROBE
2-9 DATA0 ... DATA 7
10 -ACK
11 BUSY
12 PE
13 SELECT
14 -AUTOFD
15..18 ------ not connected
19..30 GND
31 -INIT
32 -ERROR
33..35 ------ not connected
36 -SELIN

5 SW-1 Control interface DIL switchline
Description of the switches in SW-1 DIL: 

            +-----+        +------------- UPGRADE
            | SW-1|        |
            +-----+        |
                           |
            +- 1--2--3--4--5--6--7--8--+
     0  OFF | +-++-++-++-++-++-++-++-+ |
            | |-||-||-||-||-||-||-||-| |
     1   ON | +-++-++-++-++-++-++-++-+ |
            +--------------------------+
              --NOT USED-- |  ----  +---- MUST BE ON!
                           | LSB MSB
                           |  COMM
              RS-232 BAUD  | DEVICE
                           |  AND
                           | SERVICE
                           +------------- OPERATING
  

  
SymbolDescription
  
SW-1/1-4          Not used

  
SW-1/5        Operating mode

    The operating mode of the test-init can be set by this switch.

  

  
  ON  OPERATING  Normal operation.
 During normal use the switch
 must
                     remain in this position.
  
  OFF UPGRADEProgram down-load mode.
  


  
SW-1/6-7    Communication interface type



  

  
  LSB  MSB
  
   6    7

  
  ON  ON            Illegal setting
  
  ON  OFF RS-232C   (serial) RS-232C interface
  
  OFF ON  IEEE-1284 (parallel) IEEE-1284  (EPP) interface
  
  OFF OFF MODEM     (serial) RS-232 interface with modem
  


  
SW-1/8      Must be keep ON!
  



    **************************************************************
    *   WARNING!                                                 *
    *                                                            *
    *   Settings of the switches must be done in power off state *
    *   of the device! Settings done in power on state are not   *
    *   accepted by the test-unit.                               *
    *                                                            *
    **************************************************************