Serial Port Pin Assignments

Serial Port Pin Assignments

The DB-9 serial port on the rear panel is used to connect the CheetahAccess Wireless Gateway to an ISDN TA or PSTN modem. The pin assignments used to connect to this port are provided in the following tables.

Figure B-2. DB-9 Serial Port Pin Numbers

DB-9 Port Pin Assignments

EIA

CCITT

Description

Gateway’s

PC DB9

Modem

Signal

Circuit

Signal

 

DB9 DTE

DTE

DB25 DCE

Direction

 

 

 

Pin #

Pin #

Pin #

DTE-DCE

CF

109

DCD (Data Carrier Detected)

1

1

8

<------

BB

104

RxD (Received Data)

2

2

3

<------

BA

103

TxD (Transmitted Data)

3

3

2

------>

CD

108.2

DTR (Data Terminal Ready)

4

4

20

------>

AB

102

SG (Signal Ground)

5

5

7

-------

CC

107

DSR (Data Set Ready)

6

6

6

<------

CA

105

RTS (Request-to-Send)

7

7

4

------>

CB

106

CTS (Clear-to-Send)

8

8

5

<------

CE

125

RI (Ring Indicator)

9

9

22

<------

B-3

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Image 63
Accton Technology AC-IG2004W manual Serial Port Pin Assignments, DB-9 Port Pin Assignments, Circuit Signal