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D. Pin Assignments
3160-A2-GB21-90 February 2001
D-3
DTE Drop/Insert Interface
The DTE Drop/Insert (DSX-1) interface connector is a DB15-type socket
connector (Table D-2, DTE Drop/Insert (DSX-1) Connector). For information about
using Relay Contact Sense for external DTE loopback, refer to the Extrn DLB
configuration option in
DTE Interface Configuration Options
in Appendix C,
Configuration Options
.
The DTE Drop/Insert (DSX-1) cable (Figure D-3, DTE Drop/Insert (DSX-1) Cable)
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.
Figure D-3. DTE Drop/Insert (DSX-1) Cable
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
494-14152-02
1
9
2
3
11
4
12
14
RECEIVE TIP
RECEIVE RING
SHIELD GROUND
TRANSMIT TIP
TRANSMIT RING
SHIELD GROUND
RETURN
SENSE
TO
DTE
TWISTED PAIR
TWISTED PAIR
DB15
PLUG
EXTERNAL
RELAY
CONTACT