This service board is required for special development purposes. The board provides a 20 pin JTAG connector, easy access to the console port ttyS0, as well as programmable diagnostic LEDs. JTAG offers direct access to the ARM9 processor in OpenNetCom.
Service Connector
24-pin header (male), connect to Base board via flat ribbon cable
Debug Connector
DSUB 9 male, RS232 level. Connects to console port ttyS0. Signals TxD, RxD, RTS, CTS