Appendix G GATM wiring chart 217
BCM50 Installation and Maintenance Guide
Appendix G
GATM wiring chart
Analog telephone lines are connected to the GATM4 or GATM8 through the RJ-21 connector on
the front of the media bay module (MBM) (see Figure 85).
Figure 85 GATM RJ-21 connector
Table 43 lists the wiring details for the RJ-21 connector on the GATM4.
Table 43 GATM4 RJ-21 connector wiring (Sheet 1 of 2)
Line Pin Connection Wire color
Default line numbers on
Expansion port 1
Default line numbers on
Expansion port 2
1
26 Tip White-Blue
065 095
1 Ring Blue-White
2
27 Tip White-Orange
066 096
2 Ring Orange-White
—
28 No connection White-Green
— —
3 No connection Green-White
—
29 No connection White-Brown
— —
4 No connection Brown-White
3
30 Tip White-Slate
067 097
5 Ring Slate-White
4
31 Tip Red-Blue
068 098
6 Ring Blue-Red
—
32 No connection Red-Orange
— —
7 No connection Orange-Red
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.
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.
.
.
.
—
49 No connection Violet-Brown
— —
24 No connection Brown-Violet
RJ-21 pin outRJ-21 connector
GATM
