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Appendix I DSM16 and DSM32 wiring charts 225
BCM50 Installation and Maintenance Guide
Appendix I
DSM16 and DSM32 wiring charts
Digital telephones, such as the Business Series Telephones, are connected to the Digital Station
Module (DSM16 or DSM32) through the RJ-21 connectors on the front of the media bay module.
The DSM16 has a single RJ-21 connector and the DSM32 has two RJ-21 connectors (see Figure
87).
Figure 87 DSM16 and DSM32 RJ-21 connectors
Table 48 lists the wiring details for the RJ-21 connectors on the DSM16 and DSM32.
Table 48 DSM16 and DSM32 RJ-21 connector wiring (Sheet 1 of 2)
Set Pin Connection Wire color
Default DN on Expansion port 1 Default DN on Expansion port 2
DSM16 or
Lower DSM32
RJ-21
Upper DSM32
RJ-21
DSM16 or
Lower DSM32
RJ-21
Upper DSM32
RJ-21
1
26 Tip White-Blue
237 253 269 285
1 Ring Blue-White
2
27 Tip White-Orange
238 254 270 286
2 Ring Orange-White
3
28 Tip White-Green
239 255 271 287
3 Ring Green-White
4
29 Tip White-Brown
240 256 272 288
4 Ring Brown-White
RJ-21 pin out
RJ-21 connector
DSM16
RJ-21 connectors
DSM32