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COMSPHERE 392xPlus Modems
C-6 November 1996 3920-A2-GN31-30
To
connect a Model 3920
Plus port to another modem’s EIA-232-D interface, use a 25-pin
crossover cable (Figure C-4).
1
2
3
4
5
6
7
8
25-POSITION
PLUG PIN NO.
25-POSITION
PLUG PIN NO.
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
TXD
RXD
RTS
DSR
SG
LSD
RXC
DTR
XTXC
TXD
RXD
RTS
DSR
SG
LSD
RXC
DTR
XTXC
CT140
CT142
(TEST)
CT142
(TEST)
CT140
Figure C-4. Wiring Diagram — 25-Pin Crossover Cable