2010/6/21 Philip Prindeville <[email protected]>: > Even if the call originator can't control it, the remote party could at > least generate a progression indication that would allow the caller to > terminate the call at that point
Telco providers don't want to reply a provisional response as the caller could hangup before the call is established (so less money for the provider). In a happy world the behavior of a voicemail system would be as follows: - Alice call Bob who is offline. - The proxy/b2bua/network routes the call to a voicemail server. - The voicemail server sends early-media announcement: "Bob is offline, if you want to leave him a message wait for the tone". - If Alice waits for the tone then the voicemail system answers the call and the message recording starts. - If not, Alice doesn't pay for such unuseful call. But this means less money for the telco. -- Iñaki Baz Castillo <[email protected]> _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
