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D-33160-A2-GB21-50 January 1997
DTE Drop/Insert Interface
The DTE Drop/Insert (DSX-1) interface connector is a
DB15-type socket connector (Table D-2). For information
about using Relay Contact Sense for external DTE
loopback, refer to the Extrn DLB configuration option in
the DTE Interface Configuration Options section of
Appendix C.
The DTE Drop/Insert (DSX-1) cable (Figure D-3) is
typically supplied by a DTE vendor. It is made of shielded
twisted-pair wires (22 AWG). The cable connector is a
DB15-type plug connector. Be sure to connect the shield
ground only at the DSU/CSU end to prevent ground
loops.
Table D-2
DTE Drop/Insert (DSX-1) Connector
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
Figure D-3. DTE Drop/Insert (DSX-1) Cable