Hi MikeM,
thanks for the suggestion. I have tried also that (setting of answer delay to 120second) and did not see any changes. the pstn line disconnects exactly after 60 seocnds and we hear 2 different quick peep tones. The fisrt one takes exactly that 5 seocnds and after the next quick peep tones starts, the call is disconnected.
Very strange but a real.
Regards
Durun