Siemens 2614 User Manual
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