Paradyne Comsphere 3920Plus Installation And Operation Manual page 222

COMSPHERE 392xPlus Modems
To connect a Model 3920Plus port to another modem's EIA-232-D interface, use a 25-pin
crossover cable (Figure C-4).
25-POSITION
PLUG PIN NO.
TXD
RXD
RTS
DSR
SG
LSD
RXC
DTR
CT140
XTXC
CT142
(TEST)
C-6
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
Figure C-4. Wiring Diagram — 25-Pin Crossover Cable
April 1995
25-POSITION
PLUG PIN NO.
1
TXD
2
RXD
3
RTS
4
5
6 DSR
7 SG
8
LSD
9
10
11
12
13
14
15
16
RXC
17
18
19
DTR
20
CT140
21
22
23
XTXC
24
CT142
25
(TEST)
3920-A2-GN31-10