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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. CentraI Office Network Interface Codes
Federal Interface
Trunk Type
Code for Trunk
Network Interface
LS central office trunk
02LS2
RJ11C, RJ14C. RJ21
GS central office trunk 02GS2
RJ11C, RJ14C, RJ21
DID 02 RV2-T
RJ11C, RJ14C, RJ21
OPS
0L13C
RJ11C
Tie trunk
TL31M
RJ2GX
DS1
04DU9-B RJ48C/X
04DU9-C See note below.
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.
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 wiring kits.
Connecting the Control Unit to the Network Interface 4-3