Nortel Circuit Card Installation Manual page 515

Table 170
RS-232-C and RS-422 pinouts for first three DAC ports (Part 2 of 2)
I/O cable
Pair Pin
7R 7
8T 33
8R 8
9T 34
9R 9
10T 35
10R 10
11T 36
11R 11
12T 37
12R 12
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.
Pair
color Unit no.
O-R
R-G
G-R
R-BR UNIT 2
BR-R
R-S
S-R
BK-BL
BL-BK
BK-O
O-BK
NT7D16 Data Access card
RS-232-C
Signal Pin no.
DSR1 6
RI1 22
CTS1 5
TD2 2
RD2 3
DTR2 20
GND2 7
DCD2 8
DSR2 6
RI2 22
CTS2 5
Circuit Card
Page 515 of 906
RS-422 Patch pair or
Signal octopus
RDA2
RDB2
SDA2
SDB2 Connector
3
Description and Installation