C-4 Netopia ISDN Modem User’s Guide

PC serial cable pin assignments

The DB-25 male to DB-9 female pin assignments for the PC serial cable are given below.

DB--9

Pin Name

DB-25

Pin #

Pin #

 

 

 

 

 

 

 

1

Data Carrier Detect (DCD)

8

 

 

 

2

Receive Data (RD)

3

 

 

 

3

Send Data (SD)

2

 

 

 

4

Data Terminal Ready (DTR)

20

 

 

 

5

Signal Ground (GND)

7

 

 

 

6

Data Set Ready (DSR)

6

 

 

 

7

Request to Send (RTS)

4

 

 

 

8

Clear to Send (CTS)

5

 

 

 

9

Ring Indicator (R)

22

 

 

 

Shield

1

 

 

 

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