Nortel Networks Circuit Card User Manual
Page 277
NT5D33 and NT5D34 Lineside E1 Interface cards
Page 277 of 906
Circuit Card
Description and Installation
E1 Connections
For twisted-pair installations, E1 signaling for all 30 channels is transmitted
over P2 connector pins 1, 3, 9, and 11, as shown in Table 103 on
Plug the DB 15 male connector labeled “P2” into the E1 link. E1 transmit and
receive pairs must be turned over between the LEI and the CPE that is
hardwired without carrier facilities. If the LEI is connected through E1 carrier
facilities, the transmit and receive pairs must be wired straight through to the
RJ48 at the Telco demarc, the LTU, or other E1 carrier equipment. The E1
4
Alarm out (normally
closed)
3
7
Toward MMI terminal,
receive data
2
DB9 male toward MMI (P5).
Wired as DCE.
Data is transmitted on pin 2 (RXD)
and received on pin 3 (TXD)
31
Toward MMI terminal,
transmit data
3
33
Ground
5
8
Control 1
7
32
Control 2
9
33
Ground
5
DB9 female away from MMI terminal
(P4)
8
Control 1
7
32
Control 2
9
30
Away from MMI terminal,
transmit data
3
6
Away from MMI terminal,
receive data
2
Table 103
LEI card – lineside E1 I/O cable pinouts (Part 2 of 2)
I/O Panel
Connector
Pin
Lead Designations
LEI
Connect
or Pin
LEI Cable Connector to External
Equipment