Nortel Circuit Card Installation Manual page 401

Table 150
RS-232 interface pin assignments (Part 2 of 2)
Pin Signal name
3 Receive Data (RX)
4 Request to Send (RTS)
5 Clear to Send (CTS)
6 Data Set Ready (DSR)
7 Signal Ground (SG)
8 Carrier Detect (CD)
15 Serial Clock Transmit
(SCT)
17 Serial Clock Receive
(SCR)
18 Local Loopback (LL)
20 Data Terminal Ready
(DTR)
21 Remote Loopback (RL)
23 Data Rate Selector (DRS)
24 External Transmit Clock
(ETC)
25 Test Mode (TM)
Table 151 on page 402
It shows the connector pin number, the associated signal name, and the
NT6D80 MSDL card
EIA
circuit
BB
CA
CB
CC
AB
CF
DB
DD
LL
CD
RL
CH/CI
DA
TM
lists RS-422 interface specifications for EIA circuits.
Circuit Card
Page 401 of 906
CCITT
circuit DTE
104
105 X
106
107
102 —
109
114
115
141 X
108.2 X
140 X
111/112 X
113 X
142
Description and Installation
DCE
X
X
X
—
X
X
X
X