
• Pin 1: VDDH (3.3V) 
• Pin 2: TxD 
• Pin 3: RxD 
• Pin 4: GND (Ground) 
There are third-party vendors who provide compatible console boards, such as the 
AD233AK/AD233BK RS232 adapter kits at: 
http://www.compsys1.com/workbench/On_top_of_the_Bench/Max233_Adapter/max233
adapter.html 
Make sure the third-party adapter board is connected correctly to the corresponding pins 
of J303 on the router board.