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Appendix B BRI wiring chart 211

Installation and Maintenance Guide

Appendix B

BRI wiring chart

The digital BRI ISDN lines connects to the BCM50b, BCM50ba, and BCM50be main units

through the BRI ports (RJ-45) on the front of the main units. See the figure BRI ports and pin out

(BCM50b shown) on page 211.

The figure BRI ports and pin out (BCM50b shown) on page 211, the table BRI port wiring on page

211, and the table BRI line numbering on page 212 apply to S-Loop and T-Loop connections.

S-Loop are used to connect S-Loop devices such as video phones, terminal adapters, and Grp 3

Fax machines. The T-Loops are used to connect to the CO/PSTN.

Figure 88 BRI ports and pin out (BCM50b shown)

The table BRI port wiring on page 211 and the table BRI line numbering on page 212 list the

wiring details for the RJ-45 ports.

Warning: For a U-loop connection, the BRI port must be connected only to an NT1

provided by the service provider. The NT1 must provide a Telecommunication Network

Voltage (TNV) to Safety Extra Low Voltage (SELV) barrier.

Table 35 BRI port wiring

Pin Signal Signal on system side

1 No connection No connection

2 No connection No connection

3 + Receive (+Rx) +Tx

4 + Transmit (+Tx) +Rx

5 - Transmit (-Tx) -Rx

6 - Receive (-Rx) -Tx

7 No connection No connection

8 No connection No connection

BRI port pin out

BRI ports

1 2 ... 206 207 208 209 210 211 212 213 214 215 216 ... 334 335

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Avaya BCM50 Installationshandbuch Seite 211