2009/3/2 Dan Pascu <[email protected]>: >> Indeed, the OPTIONS may generate more traffic (depends on the >> implementation - kphone sends with SDP also, other not). But when comes >> to interoperability, OPTIONS is more accepted by end devices, rather >> then NOTIFY (where the phone must implement the method and the event). > > I don't think the phone needs to implement or for that matter even be > aware of the NOTIFY method. Any device should reply with a "not > implemented" or "method not understood" negative reply to any method it > doesn't support. Any reply will do for the purpose of keepalive, be it > positive or negative. In practice I have not encountered any device that > would not reply to a keep-alive NOTIFY.
Indeed. In fact a custom request could be used for pinging: COOL-PING! sip:[email protected] SIP/2.0 Any UAS receiving that request MUST reply "Not implemented". -- Iñaki Baz Castillo <[email protected]> _______________________________________________ Users mailing list [email protected] http://lists.opensips.org/cgi-bin/mailman/listinfo/users
