E. Pin Assignments
3160-A2-GB24-10 March 2001 E-3
DTE Drop/Insert Interface
The DTE Drop/Insert (DSX-1) interface connector is a DB15-type socket
connector (TableE-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 (FigureE- 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 E-3. DTE Drop/Insert (DSX-1) Cable
Table E-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