Nortel Circuit Card Installation Manual page 217

Table 86
Lineside T1 card – NT5D13AA connector pinouts (Part 1 of 2)
I/O panel
connector
pin Lead designations
1 T1 Tip Receive Data
26 T1 Ring Receive Data
2 T1 Tip Transmit Data
27 T1 Ring Transmit Data
3 Alarm out common
28 Alarm out (normally open)
4 Alarm out (normally closed)
7 Towards MMI terminal
Receive Data
31 Towards MMI terminal
Transmit Data
33 Ground
8 Control 1
32 Control 2
NT5D11 and NT5D14 Lineside T1 Interface cards
Table 86 shows the pin assignments when using the NT5D13AA lineside T1
I/O cable.
NT5D13AA
Lineside
T1 I/O Lineside T1 cable
connector connector to external
pin equipment
11 DB15 male to T1 (P2)
Lineside T1 card is CPE
3
transmit to network and
receive from network
1
9
1 DB9 male to external alarm (P3)
2
3
2 DB9 male towards MMI (P5)
Wired as DCE
Data is transmitted on pin 2 (RXD)
3
and received on pin 3 (TXD)
5
7
9
Circuit Card
Page 217 of 906
Description and Installation