Connecting The Control Unit To The Network Interface; Central Office Network Interface Codes - AT&T MERLIN LEGEND Release 3.1 Installation Manual

Wiring
NOTE:
If you need to connect the trunk cords differently from the instructions on the
system forms, record each change on Form 2c, System Numbering:
Line/Trunk Jacks. See Appendix A, "System Numbering Forms."
Also, you may need to know the interface codes for network facilities. These
codes are shown in Table 4–2, by trunk type and adapter type.
Table 4–2. Central Office Network Interface Codes
Trunk Type
LS central office trunk
GS central office trunk
DID
OPS
Tie trunk
BRI
DS1
NOTE:
The preferred network interface is the RJ48X. If a customer's site uses the
RJ48X interface and the customer's equipment does not provide connection,
the T1 trunk's receive pair is looped back to the transmit pair. This simplifies
troubleshooting the T1 trunk from the central office.
In most installations, the network interface is connected through a cross-
connect field to the control unit. However, for systems with fewer than 24
extensions, you can connect the trunk wires directly to the control unit.
Federal Interface
Code for Trunk
02LS2
02GS2
02RV2-T
OL13C
TL31M
02B1Q
04DU9-B
04DU9-C

Connecting the Control Unit to the Network Interface

Network Interface
RJ11C, RJ14C, RJ21
RJ11C, RJ14C, RJ21
RJ11C, RJ14C, RJ21
RJ11C
RJ2GX
RJ11C, RJ14C, RJ21
RJ48C/X
See note below.
4–3