B&B Electronics 708TX - Manual - Manual (Page 17)

(Revised 2010-7-30) Page 17 of 154
SERIAL INTERFACE
The 700 Series switches provide an EIA-232 interface accessed via a 9-pin female connector (labeled
‗COM‘ on the unit). This is used to access the Command Line Interpreter (CLI). The pin-outs are shown
below:
Serial Cable
Connect the serial COM port of your PC and the 700 Series Switch using a standard straight through serial
cable. You will require a cable with a 9-pin or 25-pin sub-D female connector for the PC end, and a 9-pin
male sub-D connector for the 708 Series end.
The following table shows the pin-out and the connections for both types of cable:
PC Port 25-Pin 9-Pin 700 Series
Female Female 9-Pin Male
Signal Name Pin # Pin # Pin # Signal Name
TXD 2 3 3 RXD
RXD 3 2 2 TXD
GND 7 5 5 GND
Standard straight through serial cables are readily available from Radio Shack or a variety of computer
stores.
HyperTerminal
The following configuration should be used in HyperTerminal:
Port Settings:
115200
Data Bits: 8
Parity: NONE
Stop bits: 1
Flow Control: NONE