C5402 DSK:DAA busy tone detect

Started by Unknown December 5, 2000
Good day.

I was running through the DAA example of C5402 DSK. When DAA detects
two ring tone, the phone goes off-hook. However, after the caller hung
up, the phone does not go on-hook. I like to implement a busy tone
detect routine, set the phone on-hook and restart the wait for ring

Anyone like to share their experience with asm or C code for busy tone
detect? The busy/disconnect tone in my country is at 425Hz with even
on-off interval of 750ms.

This DSK provides DAA APIs for ring detect, off-hook, on-hook
functions etc. However, there is no clue on how these functions
works(like a black box).

Thank you for your time and attention.