xrg, many thanks for your reply. yep, is analog has definately been troublesome. At least with the Sangoma card I don't get the echo drama
I added "callprogress=yes" to zapata.conf & thought I got somewhere as an unanswered call now shows:
-- Called g0/5550000
-- Nobody picked up in 30000 ms
-- Hungup 'Zap/1-1'
ie. minus the -- Zap/1-1 answered
Unfortunately it does the same for a call that is answered
Tried busydetect=yes & busycount=5 as well but same result as above.
Other zapata tweaks that you mentioned, are these to do with echo (eg. echotraining, tx/rxgain) &/or other?
Is it possible to not start billing until after the first X secs of a call? Not very accurate I know but is less troublesome than billing for unanswered calls.