3Com 3C63311 Reference Guide - Page 61
Connector Pinouts for X.21 DTE cable 60-pin Connector to DB-15 Male, Frame GND, Circuit GND
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Installation Procedures 49 Table 17 Connector Pinouts for X.21 DTE cable (60-pin Connector) to DB-15 Male Signal Name Frame GND Circuit GND RTS CTS DSR DCD (not used, see DCE cable) DTR LL (not used) SD+ SDRD+ RDSCTE+ SCTESCR+ SCRSCT+ SCTShorting GR 1 Shorting GR 2 Pin # on 60-pin Connector 46 15 9, 10 1, 2 Pin # on DB-25 Connector 1 8 3, 10 5, 12 Direction (for Serial Port) Out In In In Out Out 11 2 Out 12 9 Out 28 4 In 27 11 In Out Out 26 6 In 25 13 In In In 47, 48 51, 52,
Installation Procedures
49
Table 17
Connector Pinouts for X.21 DTE cable (60-pin Connector) to DB-15 Male
Signal Name
Pin # on 60-pin
Connector
Pin # on DB-25
Connector
Direction (for
Serial Port)
Frame GND
46
1
Circuit GND
15
8
RTS
9, 10
3, 10
Out
CTS
1, 2
5, 12
In
DSR
In
DCD (not used, see
DCE cable)
In
DTR
Out
LL (not used)
Out
SD+
11
2
Out
SD-
12
9
Out
RD+
28
4
In
RD-
27
11
In
SCTE+
Out
SCTE-
Out
SCR+
26
6
In
SCR-
25
13
In
SCT+
In
SCT-
In
Shorting GR 1
47, 48
Shorting GR 2
51, 52,