Connectors, Cables, and Pin Assignments

COM Port Connector

The following table shows the signals and pin assignments for the DB25 communication port connector.

Signal

Direction

Pin #

 

 

 

Shield

Ð

1

 

 

 

Transmit Data (TXD)

To COM port (In)

2

 

 

 

Received Data (RXD)

From COM port (Out)

3

 

 

 

Request to Send (RTS)

To COM port (In)

4

 

 

 

Carrier Detect (CD)

From COM port (Out)

5, 6, 8

 

 

 

Signal Ground (SG)

To/From COM port

7

 

 

 

Data Terminal Ready (DTR)

To COM port (In)

20

 

 

 

COM Port-to-Terminal Cable (Feature No. 3100-F2-540)

Order this cable when connecting the COM port to an asynchronous terminal; it does not come with the FrameSaver unit. The following shows the

pin assignments from the COM port to the terminal interface.

COM Port

 

 

 

 

Non-Keyed

 

 

DTE

 

8-Position

 

 

 

Modular Plug

 

DB25 Plug

 

 

 

 

 

 

 

 

Tx Clock

1

 

 

 

 

15

Rx Data

 

 

 

 

Rx Data

2

 

 

 

 

3

 

 

 

 

Ground

3

 

 

 

 

7

Ground

 

 

 

 

Tx Data

4

 

 

 

 

2

Tx Data

 

 

 

 

DTR

5

 

 

 

 

20

DTR

 

 

 

 

CD

6

 

 

 

 

8

CD

 

 

 

 

RTS

7

 

 

 

 

5

CTS

 

 

 

Rx Clock

8

 

 

 

 

6

DSR

 

 

 

 

 

 

 

 

 

 

4

RTS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

496-14910

C-2

March 2000

9664-A2-GB20-00

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Image 216
Paradyne 9664 manual COM Port Connector, COM Port-to-Terminal Cable Feature No -F2-540, Signal Direction Pin #
Page 215 Page 217

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