3Com SuperStack II PathBuilder S330 Reference Manual page 233

Wan access switches
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Table 23 Connector Pinouts for RS-449 DTE Cable (Part #3C63920)
Pin # on 60-pin
Signal Name
Connector
Frame GND
46
Circuit GND
15, 16, 45
RTS
9, 10
CTS
1, 2
DSR
3, 4
DCD (not used, see
5, 6
DCE cable)
DTR
7, 8
LL (not used)
44
SD+
11
SD-
12
RD+
28
RD-
27
SCTE+
13
SCTE-
14
SCR+
26
SCR-
25
SCT+
24
SCT-
23
Shorting GR 1
48, 49
Shorting GR 2
51, 52,
Connector Pinouts
Pin # on DB-37
Direction (for
Connector
Serial Port)
1
19, 20, 37
7, 25
Out
9, 27
In
11, 29
In
13, 31
In
12, 30
Out
10
Out
4
Out
22
Out
6
In
24
In
17
Out
35
Out
8
In
26
In
5
In
23
In
225

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