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Models 3151/3161 Interface Connections
B-73000-A2-GA31-80 December 1994
DSX-1 Port DTE Interface
This cable is typically supplied by a DTE vendor and is
a 22 AWG solid, individually shielded twisted pair cable
with drain wire (see Figure B-4). The cable connector is a
DB15 plug. Be sure to connect the shield ground only at
the DSU/CSU end as shown in Figure B-4 to prevent
ground loops. The DTE (DSX-1) interface connector is a
DB15-type socket connector (see Table B-3). Refer to the
Extrn DLB configuration option in the DTE Interface
Options section in Appendix B of the ACCULINK 315x
Channel Service Unit Operator’s Guide or the
ACCULINK 316x Data Service Unit/Channel Service Unit
Operator’s Guide for more information.
Figure B-4. DTE (DSX-1) Cable
Table B-3
DTE (DSX-1) Interface Connector (J3)
Signal
Pin Number
Receiver Tip from DTE 1
Receiver Ring from DTE 9
Transmitter Tip to DTE 3
Transmitter Ring to DTE 11
Relay Contact Sense Return 12
Relay Contact Sense 14
Shield Ground 2, 4