EIA-232 Cabling Diagrams

Modem DB25 Connector

The following diagrams show how a standard straight through cable should be configured when connecting to a DB25 modem.

DB25 Male

IOLAN DS1

 

 

 

 

Modem DB25

DB25 (DTE)

 

 

 

 

(DCE)

 

 

 

 

 

 

2 (TxD)

 

 

2

(RxD)

 

3 (RxD)

 

 

3

(TxD)

 

4 (RTS)

 

 

4

(CTS)

 

5 (CTS)

 

 

5

(RTS)

 

6 (DSR)

 

 

6

(DSR)

 

7 (GND)

 

 

7

(GND)

 

8 (DCD)

 

 

8

(DCD)

 

20 (DTR)

 

 

 

20 (DTR)

 

 

 

RJ45

 

 

 

 

 

 

 

Modem DB25

IOLAN RJ45

 

 

 

 

(DCE)

 

 

 

 

 

 

 

 

10-pin

 

8-pin

 

 

 

 

 

2

(DCD)

1

 

 

8

(DCD)

 

3

(RTS)

2

 

 

4

(CTS)

 

4

(DSR)

3

 

 

6

(DSR)

 

5

(TxD)

4

 

 

2

(RxD)

 

6

(RxD)

5

 

 

3

(TxD)

 

7

(GND)

6

 

 

7

(GND)

 

8

(CTS)

7

 

 

5

(RTS)

 

9

(DTR)

8

 

 

 

20 (DTR)

 

 

 

358

IOLAN SDS/SCS/STS User’s Guide, Version 3.6

Page 358
Image 358
Perle Systems STS, SCS manual Modem DB25 Connector, Iolan RJ45 DCE