2010/3/20 Olle E. Johansson <o...@edvina.net>: >> Also, there are cases in which the PSTN gateways reply a 183 followed >> by a 180. This makes crazy some phones which don't know what to render >> (real audio of 183 or artificial ringing requested by the 180). >> > In the case of using early media just to send a ring tone, I would prefer > sending 180 with SDP, > or 180 first, then 183 with SDP. I don't like devices that only send 183 with > SDP for ring tone.
Unfortunatelly this doesn't depend just on the device itself, but the devices connected to it. For example, some TDM nodes fake the ringing and generate real audio. When such TDM signaling arrives to a SIP-PSTN gateway, it must generate a 183 with SDP :( -- Iñaki Baz Castillo <i...@aliax.net> _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
