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Wiring diagram — 25-pin crossover cable – Paradyne 3910 User Manual

Page 233

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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

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

Figure C-4. Wiring Diagram — 25-Pin Crossover Cable