Nortel Circuit Card Installation Manual page 275

NT5D33 and NT5D34 Lineside E1 Interface cards
This cable consists of a 25-pair amphenol connector (P1) on one end which
plugs into the I/O panel. The other end has 4 connectors:
1 a DB15 female connector (P2) with an adapter that breaks out Tx
(transmit) and Rx (receive) connectors, which that plug into the E1 line
2 a DB9 male connector (P3), which plugs into an external alarm system
3 a second DB9 male connector (P5), which connects to an MMI terminal
or modem
4 a DB9 female connector (P4), which connects to the next LEI's P4
connector for MMI daisy chaining. The Tx marking on the adapter at P2
is the LEI output. The E1 data stream coming from the network into the
LEI connects at the Rx coaxial connector
Table 102 shows the pin assignments of the LEI backplane and I/O Panel.
Table 102
LEI card – LEI backplane and I/O panel pinouts (Part 1 of 2)
Backplane
connector pin
12A
12B
13A
13B
14A
14B
15A
15B
16A
16B
I/O Panel
connector pin Signal
1 E1 Tip, Receive data
26 E1 Ring, Receive data
2 E1 Tip, Transmit data
27 E1 Ring, Transmit data
3 Alarm out, normally open
28 Alarm out, common
4 Alarm out, normally closed
29 No connection
5 No connection
30 Away from MMI terminal, receive
data
Circuit Card
Page 275 of 906
Description and Installation