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COMSPHERE 3900 Series Modems
C-6 September 1998 3910-A2-GN32-40
To connect a Model 3910 port to another modem’s EIA-232-D interface, use a 25-pin crossover
cable (Figure C-4).
1
2
3
4
5
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7
8
25-POSITION
PLUG PIN NO.
25-POSITION
PLUG PIN NO.
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10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
1
2
3
4
5
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25
TXD
RXD
RTS
DSR
SG
LSD
RXC
DTR
XTXC
TXD
RXD
RTS
DSR
SG
LSD
RXC
DTR
XTXC
Figure C-4. Wiring Diagram — 25-Pin Crossover Cable