asterisk users - Sep 2003 - Hangup Detection and BUSYDETECT_MARTIN

Hello,

I've got the following configuration:

2 X101Ps
Asterisk built with BUSYDETECT_MARTIN
busydetect=yes
busycount=10
callprogress=yes
signalling = fxs_ks

With this setup, the best I can do is get voicemail with 17 to 19 seconds of 
silence tacked on at the end. Ideally, I'd like at most 2-5 seconds. Has 
anyone had any success with this?

 It seems that hangups are indeed detected, since if I fiddle with the above 
configuration much then the silence at the end of the message increases 
dramatically.

Is there a soft timeout for silence detection somewhere? Where should I be 
looking in the code to understand the silence detection stuff? dsp.c and 
app_voicemail.c?

Thanks for any help,

Christian