You can use the same Console cable that you use to console into a router.
Follow these instructions to console into the 340 .
1. Attach the console port cable to the console port on the bridge.
2. Attach the other end of the console cable to the serial port on a terminal or PC running a terminal emulation program.
3. Set the terminal to 9600 baud, 8 data bits, No parity, 1 stop bit, and Xon/Xoff flow control.
For more information have a look at the document.
http://www.cisco.com/en/US/products/ps6437/products_quick_start09186a00800eaabf.html#xtocid6
