Nortel Networks BCM200/400 - Manual (Page 152)

152 Chapter 9 Connecting the cables
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Figure 79 on page 152 shows the wiring pin-outs for a GATM to connect to a service provider.
Wiring MBMs to internal connections
After you wire the trunk MBMs, you can install the wiring to the station MBMs. These are the
MBMs that connect to the internal telephone sets.
All station MBM wiring uses 25-pair cable with a female amphenol connector at the MBM end.
Figure 79 GATM pin-outs
Line Pin Wire color
GATM
module
1
26 White-Blue
Both
1 Blue-White
2
27 White-Orange
Both
2 Orange-White
No
connection
28/3
29/4
3
30 White-Slate
Both
5 Slate-White
4
31 Red-Blue
Both
6 Blue-Red
No
connection
32/7
33/8
5
34 Red-Brown
GATM8
9 Brown-Red
6
35 Red-Slate
GATM8
10 Slate-Red
No
connection
36/11
37/12
7
38 Black-Green
GATM8
13 Green-Black
8
39 Black-Brown
GATM8
14 Brown-Black
No
connection
40/15 to
49/24
Aux
50 Violet-Slate
Both
25 Slate-Violet
Note: DSM 32 MBMs require two 25-pair cables.
8R
7R
6R
5R
4R
3R
2R
1 R
9R
10R
11R
12R
13R
14R
15R
16R
33T
32T
31T
30T
29T
28T
27T
26 T
34T
35T
36T
37T
38T
39T
40T
41T
17R
42T
18R
43T
19R
44T
20R
45T
21R
46T
22R
47T
23R
48T
24R
49T
25R
50T
AUX
Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7
Line 8
For the G4x16 and G8x16, the lower 25-pair connector is the
analog trunk part of the module and is wired the same as the GATM.