Hello, On Thursday 24 Jun, 2010, at 10:07 PM, marek cervenka wrote: > the problem is probably somewhere in indication code. after > downgrade to > 1.6.2.1 ringback tone works > > i'm trying compare 1.6.2.9/1.6.2.1 indication code I had asterisk 1.6.0.6 with chan_ss7 1.3 when I first encountered this problem. The issue is with tone generation definitely as it works when the ringback tone is generated by a remote server (callweaver 1.2) Regards, - vma .