Nortel Circuit Card Installation Manual page 276

Page 276 of 906
Table 103
LEI card – lineside E1 I/O cable pinouts (Part 1 of 2)
I/O Panel
Connector
Pin Lead Designations
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)
553-3001-211 Standard 3.00
NT5D33 and NT5D34 Lineside E1 Interface cards
Table 102
LEI card – LEI backplane and I/O panel pinouts (Part 2 of 2)
Backplane
connector pin
17A
17B
18A
18B
19A
19B
Table 103 shows the pin assignments from the I/O panel relating to the pin
assignments of the lineside E1 I/O cable.
August 2005
I/O Panel
connector pin Signal
6 Away from MMI terminal, transmit
data
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
Connect LEI Cable Connector to External
or Pin Equipment
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)