Rj-21 Telephony Connector Wiring Chart - Nortel BCM50 3.0 Installation And Maintenance Manual

Appendix A

RJ-21 telephony connector wiring chart

You can connect 4 analog telephone lines (standard main units only), 4 analog telephony devices,
and 12 digital telephones to the RJ-21 telephony connector.
Note: The four analog lines on the RJ-21 telephony connector are available only on the
standard main units. The four analog lines are not available on the BRI series (b-series)
main units, which have two BRI ports instead.
The figure RJ-21 telephony connector on a BCM50
connector on a BCM50.
Figure 87 RJ-21 telephony connector on a BCM50
The table RJ-21 telephony connector wiring
telephony connector.
Table 34 RJ-21 telephony connector wiring (Sheet 1 of 3)
Device Pin Connection
26 Tip
1
1 Ring
27 Tip
2
2 Ring
28 Tip
3
3 Ring
29 Tip
4
4 Ring
Note: The four analog lines are available only on the standard main units; the analog lines are not available on the
BRI series (b-series) main units, which have two BRI ports instead.
Appendix A RJ-21 telephony connector wiring chart
Main Unit
RJ-21 telephony connector
Wire color Type of device
White-Blue
Analog line
Blue-White
White-Orange
Analog line
Orange-White
White-Green
Analog line
Green-White
White-Brown
Analog line
Brown-White
on page 207 shows the RJ-21 telephony
on page 207 lists the wiring details for the RJ-21
Port
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—
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Installation and Maintenance Guide
RJ-21 telephony
connector pin out
Default line
Default DN number
— 061
— 062
— 063
— 064
207