Telephone System Installation and Maintenance Guide

Appendix H 4x16 wiring charts 223
BCM50 Installation and Maintenance Guide
14
39 Tip Black-Brown
266 298
14 Ring Brown-Black
15
40 Tip Black-Slate
267 299
15 Ring Slate-Black
16
41 Tip Yellow-Blue
268 300
16 Ring Blue-Yellow
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42 No connection Yellow-Orange
— —
17 No connection Orange-Yellow
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50 No connection Violet-Slate
— —
25 No connection Slate-Violet
Table 47 4x16 RJ-21 connector wiring (Sheet 2 of 2)
Set Pin Connection Wire color
Default DN on
Expansion port 1
Default DN on
Expansion port 2