Serial port conection for AT commands


I just bought open AT SDK Development Kit Q2686.
I have set-up the H/W following the UG instructions, with all the switches as per the instructions. However, I failed to do the serial port connection to the Terminal emulator.

It seems that the AT commands are sent from the PC but no answer from the kit
Once I connect the serial cable to the com port in the PC and send AT command, both the CHARGER RED Led and the FLASH-LED start to blink.
(The same happens when trying to connect the kit via Hyper termianl from PC). I tried both UART1 and 2, both give the same result as explained above.
Without connection to the Com port, the following leds are light ON(no blinking):
Charger (Red)
Supply VBAT ( Green)
ports (UART1, 2, USB) are all Green
Ring indicator ( Yellow)

Any help is very much appreciated


Plase stop multi-posting your question! :stuck_out_tongue: