Backplane pinout and signaling – Nortel Networks Circuit Card User Manual
Page 514
Page 514 of 906
NT7D16 Data Access card
553-3001-211 Standard 3.00 August 2005
Backplane pinout and signaling
Two 40-pin, and two 20-pin edge connectors connect the card to the
backplane. The detailed pinout configurations are listed in Tables 170 and
171.
Table 170
RS-232-C and RS-422 pinouts for first three DAC ports (Part 1 of 2)
I/O cable
Unit no.
RS-232-C
RS-422
Signal
Patch pair or
octopus
Pair
Pin
Pair
color
Signal
Pin no.
1T
26
W-BL
UNIT 0
TD0
2
RDA0
1R
1
BL-W
RD0
3
RDB0
2T
27
W-O
DTR0
20
SDA0
2R
2
O-W
GND0
7
SDB0
Connector
3T
28
W-G
DCD0
8
1
3R
3
G-W
DSR0
6
4T
29
W-BR
RI0
22
4R
4
BR-W
CTS0
5
5T
20
W-S
UNIT 1
TD1
2
RDA1
5R
5
S-W
RD1
3
RDB1
6T
31
R-BL
DTR1
20
SDA1
6R
6
BL-R
GND1
7
SDB1
Connector
7T
32
R-O
DCD1
8
2
Note 1: The RS-232 pinout follows the standard set by the QPC723 RILC.
Note 2: The RS-422 pinout follows the standard set by the QPC430 AILC (first pair: Receive
Data; second pair: Send Data). Receive and Send are designated with reference to the DTE;
therefore, they must be turned over in the cross-connect since most DTE have first pair as Send
Data and second pair as Receive Data.