Dear List im try to look if IAX2 protocol is able to transport an hangup cause from a TDM PRI line, as i can see from this link http://www.cornfed.com/iax.pdf seems support only few message like congestion,busy,call progress, answer,ring,ringing but i cannot transport the Cuase of PRI hangup some idea. IF i use the send text feature of IAX2 between 2 * Box? I can receive this text? I design my scenario: Site A (AstGateway) Site B (AstGateway) Incoming->TDM-> IAX2 |-------|Hangup Cause|------>| IAX2->TDM -> Termination Thanks for possible help Dimitri