Nortel Networks 400 4.0 User Manual

Appendix E DSM16 and DSM32 wiring charts

BCM200/400 4.0 Installation and Maintenance Guide

Digital telephones, such as the Business Series Telephones, are connected to a digital station 
module (DSM16 or DSM32) through the RJ-21 connectors on the front of the media bay modules 
(MBM). The DSM16 has a single RJ-21 connector and the DSM32 has two RJ-21 connectors (see 

Figure 193   DSM16 and DSM32 RJ-21 connectors

Table 91

 lists the wiring details for the RJ-21 connectors on the DSM16 and DSM32.

Table 91   DSM16 and DSM32 RJ-21 connector wiring (Sheet 1 of 2)

1

26

Tip

White-Blue

1

Ring

Blue-White

2

27

Tip

White-Orange

2

Ring

Orange-White

3

28

Tip

White-Green

3

Ring

Green-White

4

29

Tip

White-Brown

4

Ring

Brown-White

5

30

Tip

White-Slate

5

Ring

Slate-White

RJ-21 pin-out

RJ-21 connector

RJ-21 connectors