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Pin Assignments
D-33170-A2-GB20-20 December 1996
DTE Drop/Insert Interface
The DTE Drop/Insert 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 cable (Figure D-2) is typically
supplied by a DTE vendor. It is made of shielded
twisted-pair wires (22 AWG). The cable connector is a
DB15 plug. Be sure to connect the shield ground only at
the E1 DSU/CSU end to prevent ground loops.
Table D-2
DTE Drop/Insert 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-2. DTE Drop/Insert Cable