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Db-9 port pin assignments, Serial port to 9-pin com port on computer, Serial port to 25-pin dce port on modem – Siemens 2614 User Manual

Page 40

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B-3

DB-9 Port Pin Assignments

Table B-4. DB-9 Port Pin Assignment

Serial Port to 9-Pin COM Port on Computer

Table B-5. Serial Port to 9-Pin COM Port on Computer

Serial Port to 25-Pin DCE Port on Modem

Table B-6. Serial Port to 25-Pin DCE Port on Modem

EIA

Circuit

CCITT

Signal

Description

Gateway’s

DB9 DTE

Pin #

Computer

DB9 DTE

Pin #

Modem

DB25 DCE

Pin #

Signal

Direction

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

<------

SpeedStream 2614’s

9-Pin Serial Port

CCITT Signal

Computer’s

9-Pin COM Port

1 DCD

-----------DCD ------------

1

2 RXD

<---------TXD ------------

3

3 TXD

-----------RXD ---------->

2

4 DTR

-----------DSR ---------->

6

5 SGND

-----------SGND ----------

5

6 DSR

-----------DTR ------------

4

7 RTS

-----------CTS ----------->

8

8 CTS

<---------RTS -------------

7

9 RI

-----------RI ---------------

9

SpeedStream 2614’s

9-Pin Serial Port

CCITT Signal

Modem’s

25-Pin DCE Port

1 <---------DCD

------------

8

2 <---------RXD

------------

3

3 -----------TXD

---------->

2

4 -----------DTR

---------->

20

5 -----------SGND

----------

7

6 <---------DSR

------------

6

7 -----------RTS

----------->

4

8 <---------CTS

-------------

5

9 <---------RI

---------------

22