Nortel DMS-100 Series Maintenance Manual page 229

As shown in the following table, a maximum of 5 drawers are connected to a
metallic bus. Each drawer supports up to 64 lines. This means that no more
than 320 lines can be connected to the metallic test access.
Table 7-15 Metallic test access configuration
Metallic bus number
1
2
3
4
The following figure shows the UMP connections in the control shelf for
subscriber line test access.
Star Remote System manual maintenance 7-25
Physical line drawer numbers
1, 2, 3, 4
5, 6, 7, 8, 9
10, 11, 12, 13
14, 15, 16, 17, 18
DMS-100 Family NA100 Star Remote System XPM15 and up