I tried to configure the Tenor on three different computers unfortunately none of them worked. The communication from the Serial interface is ok and the settings are also configured as you suggested. I can only see the bootingup sequence of the Tenor A800 on the Hyper Terminal screen but the keyboard does not react according to when displayed to hit the Enter key within 3 secs. I never faced any problem like this before but, this seems as if the unit itself is not able to accept any input from the serial devices (Keyboard).
Any hint that might work here ??
Thanks for your valuable and kind support.