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ABM shelf
The ABM shelf circuit pack slot positions are numbered as shown in
Figure 2-9.
Figure 2-9
ABM shelf slot numbering
30
32
1
2
3
Tributary slots
(DS1, DS 3, OC-3)
Note: In DS1-fed applications, NT4K75 timing and cross-connect (TXC) cards
are used instead of optical interface units. NT7E02 OC-12 optical interface units
can be used in non-VTBM applications.
AccessNode Modular Business Package VTBM Ring User Guide P0904244 Issue 1.0
Introduction to equipment and cabling configurations 2-15
34
36
38
40
42
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22
Feeder
Optics
(Note)
44
46
48
50
52
Control and Maintenance
common equipment
Input/Out
(I/O)
card section
54
55
Common
equipment
card section
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