Kristian, I can't say exactly right now - but i've switched whole internal communication from IAX2 over to SIP to make sure that IAX is not causing this problem. The next step (since I've got the case with SIP too) will be to determine if audio actually arrives to a chan_ss7, though I don't know yet how exactly will do that :) (any advice?) It's not very easy trackable - since it's floating problem. With me It happen some 1 call in 100, sometimes more often. But still the case is only floatly reproducible. Maybe asterisk@xxxxxxxxx have more exact description or behavior. Regards, Anton. On 23 February 2007 13:56, Kristian Nielsen wrote: > Anton <anton.vazir@xxxxxxxxx> writes: > > In my case? when i do have 1way audio, it's always in > > the IN direction. I mean in the scheme > > > > <USER>--SIP--<CHAN_SS7_BOX>----<PSTN> - the <PSTN> side > > cannot hear the <USER> - but users hears PSTN. > > Where is the audio lost? Ie. is there audio arriving from > the SIP side on the network? Are audio packets being > delivered to the chan_ss7 module? Is chan_ss7 writing > audio down the E1 timeslot? > > - Kristian.