195
6. Appendix B: Pin Assignments 6.1.Console Port Pin Assignments
The DB-9 serial port on the switch’s rear panel is used to connect to the switch for
out-of-band console configuration. The onboard menu-driven configuration program can
be accessed from a terminal, a PC running a terminal emulation program, or from a
remote location via a modem connection. The pin assignments used to connect to the
serial port are provided in the following tables.
6.1.1.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)
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 <------