Nortel Networks 553-3001-211 manual NT5D33 and NT5D34 Lineside E1 Interface cards Page 263

NT5D33 and NT5D34 Lineside E1 Interface cards Page 263 of 894

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:

1a DB15 female connector (P2) with an adapter that breaks out Tx (transmit) and Rx (receive) connectors, which that plug into the E1 line

2a DB9 male connector (P3), which plugs into an external alarm system

3a second DB9 male connector (P5), which connects to an MMI terminal or modem

4a 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 97 shows the pin assignments of the LEI backplane and I/O Panel.

Table 97

LEI card – LEI backplane and I/O panel pinouts (Part 1 of 2)

Backplane	I/O Panel
connector pin	connector pin	Signal
12A	1	E1	Tip, Receive data
12B	26	E1	Ring, Receive data
13A	2	E1	Tip, Transmit data
13B	27	E1	Ring, Transmit data
14A	3	Alarm out, normally open
14B	28	Alarm out, common
15A	4	Alarm out, normally closed
15B	29	No connection
16A	5	No connection
16B	30	Away from MMI terminal, receive
		data

Circuit Card Description and Installation