Nortel NT1R20 Description page 187

NT5D33 and NTRB34 Line-side E1 Interface Cards
LEI circuitry routes 16 units (0-15) on the motherboard and 14 (0-13) units
on the daughterboard to 30 E1 channels. The motherboard circuit card is
located in the left card slot, and the daughterboard circuit card is located in
right card slot. For example, if you were installing the LEI into card slots 0
and 1, the motherboard would reside in card slot 0 and the daughterboard
would reside in card slot 1. In order to configure the terminal equipment
through the switch software, you will need to be able to cross-reference the
E1 channel number to the corresponding card unit number. This mapping is
shown in Table 43.
Table 43
Card unit number to E1 channel mapping (Part 1 of 2)
TN
Motherboard
Motherboard
Motherboard
Motherboard
Motherboard
Motherboard
Motherboard
Motherboard
Motherboard
Motherboard
Motherboard
Motherboard
Motherboard
Motherboard
Motherboard
Motherboard
E1 Channel Number
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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Line cards Description