Instruction manual

MERLIN LEGEND Communications System Release 5.0
Installation
555-650-140
Issue 1
June 1997
Connecting the Control Unit to the Network Interface
Page 4-3
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.
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.
Table 4-2. Central Office Network Interface Codes
Trunk Type
Federal Interface
Code for Trunk Network Interface
LS central office trunk 02LS2 RJ11C, RJ14C, RJ21
GS central office trunk 02GS2 RJ11C, RJ14C, RJ21
DID 02RV2-T RJ11C, RJ14C, RJ21
OPS OL13C RJ11C
Tie trunk TL31M RJ2GX
BRI 02B1Q RJ11C, RJ14C, RJ21
DS1 04DU9-B
04DU9-C
RJ48C/X
See note below.