Nortel NT1R20 Description page 181

Table 42
Line-side E1 card—Line-Side E1 I/O cable pinouts (Part 1 of 2)
I/O Panel
Connector Lead Designations
Pin
1 E1 Tip Receive data
26 E1 Ring Receive data
2 E1 Tip Transmit data
27 E1 Ring Transmit data
3 Alarm out, common
28 Alarm out (normally open)
4 Alarm out (normally closed)
NT5D33 and NTRB34 Line-side E1 Interface Cards
Table 41
Line-side E1 card—LEI backplane and I/O panel pinouts (Part 2 of 2)
Backplane
connector pin
17B
18A
18B
19A
19B
Table 42 shows the pin assignments from the I/O panel relating to the pin
assignments of the Line-Side E1 I/O cable.
I/O Panel
connector pin
31 Toward MMI terminal, transmit data
7 Toward MMI terminal, receive data
32 Daisy chain control 2
8 Daisy chain control 1
33 Ground
LEI
LEI Cable Connector to External
Connector
Pin
11
DB15 male to E1 (P2). LEI is CPE
transmit and receive to network
3
1
9
1
2 DB9 male to external alarm (P3)
3
Page 157 of 290
Signal
Equipment
Line cards Description