Backplane Pinout And Signaling - Nortel Circuit Card Installation Manual

Page 514 of 906

Backplane pinout and signaling

Table 170
RS-232-C and RS-422 pinouts for first three DAC ports (Part 1 of 2)
I/O cable
Pair Pin
1T 26
1R 1
2T 27
2R 2
3T 28
3R 3
4T 29
4R 4
5T 20
5R 5
6T 31
6R 6
7T 32
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.
553-3001-211 Standard 3.00
NT7D16 Data Access card
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.
Pair
color Unit no.
W-BL UNIT 0
BL-W
W-O
O-W
W-G
G-W
W-BR
BR-W
W-S UNIT 1
S-W
R-BL
BL-R
R-O
August 2005
RS-232-C
Signal Pin no.
TD0 2
RD0 3
DTR0 20
GND0 7
DCD0 8
DSR0 6
RI0 22
CTS0 5
TD1 2
RD1 3
DTR1 20
GND1 7
DCD1 8
RS-422 Patch pair or
Signal octopus
RDA0
RDB0
SDA0
SDB0 Connector
1
RDA1
RDB1
SDA1
SDB1 Connector
2