E. Connectors, Cables, and Pin Assignments

Cisco 7000 Series Router – DB25 Plug

COM Port

 

 

AUX Port

 

 

 

 

 

 

Signal

RJ45 Pin #

Direction

DB25 Pin #

 

Signal

 

 

 

 

 

 

DCE Receive Data

2

From DTE

3

 

DTE Receive Data

(RXD)

 

 

 

 

(RXD)

 

 

 

 

 

 

DCE Signal Ground

3

7

 

DTE Signal Ground

(SG)

 

 

 

 

(SG)

 

 

 

 

 

 

DCE Transmit Data

4

To DTE

2

 

DTE Transmit Data

(TXD)

 

 

 

 

(TXD)

 

 

 

 

 

 

DCE Data Terminal

5

To DTE

20

 

DTE Data Terminal

Ready (DTR)

 

 

 

 

Ready (DTR)

 

 

 

 

 

 

DCE Carrier Detect

6

To DTE

8

 

DTE Carrier Detect

(CD)

 

 

 

 

(CD)

 

 

 

 

 

 

DCE Request to

7

To DTE

4

 

DTE Request to

Send (RTS)

 

 

 

 

Send (RTS)

 

 

 

 

 

 

3COM Router – DB9 Socket

 

 

 

 

 

 

 

 

COM Port

 

 

AUX Port

 

 

 

 

 

 

Signal

RJ45 Pin #

Direction

DB25 Pin #

 

Signal

 

 

 

 

 

 

DCE Receive Data

2

From DTE

2

 

DTE Receive Data

(RXD)

 

 

 

 

(RXD)

 

 

 

 

 

 

DCE Signal Ground

3

5

 

DTE Signal Ground

(SG)

 

 

 

 

(SG)

 

 

 

 

 

 

DCE Transmit Data

4

To DTE

3

 

DTE Transmit Data

(TXD)

 

 

 

 

(TXD)

 

 

 

 

 

 

DCE Data Terminal

5

To DTE

4

 

DTE Data Terminal

Ready (DTR)

 

 

 

 

Ready (DTR)

 

 

 

 

 

 

DCE Carrier Detect

6

To DTE

1

 

DTE Carrier Detect

(CD)

 

 

 

 

(CD)

 

 

 

 

 

 

DCE Request to

7

To DTE

7

 

DTE Request to

Send (RTS)

 

 

 

 

Send (RTS)

 

 

 

 

 

 

9128-A2-GB20-80

September 2002

E-9

Page 431
Image 431
Paradyne CSU, DSU, 9126-II, 9128-II manual COM Port AUX Port Signal RJ45 Pin # Direction DB25 Pin #