The switch uses RJ-45 connectors for its serial ports. To connect to a PC’s DB9 connector, a special cable or adapter is needed. These cables and adapters are available through various sources or can be made easily. The cable must cross over the TXD and RXD signals, as both the PC and switch are DTE. The minimum cable pinout is listed in the following table.
TABLE B-9Minimum Serial Cable Pinouts
RJ-45
DB9
RXD to TXD
6
3
TXD to RXD
3
2
GND to GND
5
5
B-10Sun Netra CP3240 Switch Installation Guide • September 2009
