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DB-9 Port Pin Assignments
EIA Circuit CCITT Signal Description
Switch’s DB9
DTE Pin #
PC DB9
DTE Pin #
BB 104
RxD (Received
Data)
2 2
BA 103
TxD
(Transmitted
Data)
3 3
AB 102
SGND (Signal
Ground)
5 5
NOTE: Remaining pins are not used.
Console Port to 9-Pin DTE Port on PC
Switch’s 9-Pin Serial
Port
CCITT Signal PC’s 9-Pin DTE Port
2 RXD <---------RXD ------------ 3 TxD
3 TXD -----------TXD ----------> 2 RxD
5 SGND -----------SGND ---------- 5 SGND
NOTE: Remaining pins are not used.