B-1

Appendix B: Pin Assignments

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 on-board menu-driven configuration program can be accessed
from a terminal or from a PC running a terminal emulation program. The pin
assignments used to connect to the serial port are provided in the following tables.

DB-9 Port Pin Assignments

Console Port to 9-Pin COM Port on PC

EIA
Circuit
CCITT
Signal
Description Switch’s
DB9 DTE
Pin #
PC DB9
DTE
Pin #
Signal
Direction
DTE-DCE
CF 109 DCD (Data Carrier Detected) 1 1 <------
BB 104 RxD (Received Data) 2 2 <------
BA 103 TxD (Transmitted Data) 3 3 ------>
CD 108.2 DTR (Data Terminal Ready) 4 4 ------>
AB 102 SG (Signal Ground) 5 5 -------
CC 107 DSR (Data Set Ready) 6 6 <------
CA 105 RTS (Request-to-Send) 7 7 ------>
CB 106 CTS (Clear-to-Send) 8 8 <------
CE 125 RI (Ring Indicator) 9 9 <------
Switch’s 9-Pin Serial
Port
CCITT Signal PC’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