Filter
Top Products
WGS3 Layer 3 Switch User’s Manual
- 253 -
DB-9 Port Pin Assignments
EIA Circuit CCITT
Signal
Description Switch’s DB9
DTE Pin #
PC 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)
3 2 3 <------
BA 1033 TxD
(Transmitted
Data)
2 3 2 ------>
CD 108 DTR (Data
Terminal
Ready)
6 4 20 ------>
AB 102 SG (Signal
Ground)
5 5 7 -------
CC 107 DSR (Data
Set Ready)
4 6 6 <------
CA 105 RTS
(Request-to-S
end)
8 7 4 ------>
CB 106 CTS
(Clear-to-Sen
d)
7
8 5 <------
CE 125 RI (Ring
Indicator)
9
9 22 <------
Console Port to 9-Pin COM Port on PC
Switch’s 9-Pin Serial Port CCITT Signal PC’s 9-Pin COM Port
1 DCD ----------- DCD ------------ 1
2 TXD ----------- RXD ----------> 2