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Connecting the Control Unit to the Network Interface
Table 4-2. Central Office Network Interface Codes
Trunk
Type
Federal Interface
Code for Trunk
LS central office trunk
02LS2
GS central office trunk 02GS2
DID
OPS
02RV2-T
0L13C
Tie trunk TL31M
DS1
04DU9-B
04DU9-C
Network Interface
RJ11C, RJ14C
RJ21
RJ11C, RJ14C,
RJ21
RJ11C, RJ14C,
RJ21
RJ11C
RJ2GX
RJ48C/X
See note below.
NOTE:
The preferred network interface is the RJ48X. With the RJ48X interface, if
no connection is provided by the customer’s equipment, the T1 trunk’s
receive pair is looped back to the transmit pair. This simplifies
troubleshooting the T1 trunk.
In most installations, the network interface is connected through a cross-
connect field to the control unit. However, for systems with fewer than 24
stations, the trunk wires can be directly connected to the control unit.
When constructing wiring fields between the network interface and the control
unit, you must order hardware as individual parts. Do not use Interconnect
Wiring or SYSTIMAX kits.
4-4
Wiring