My reason for enabling SIP over TCP is for calling iPhone/SIPhone and Android/Sipdroid - based on googling it is the only way IMHO to receive incoming calls for those devices in Standby mode ...
-- Igor Ostapchenko +1-877-OCTANIX ext:2021 On Wed, 2010-12-29 at 12:55 -0600, John Lange wrote: > Sorry to revive a stale thread but I've been doing some work recently > with the Cisco 9971 phone and interestingly this phone is TCP only for > both SIP and RTP. > > Since Microsoft and Cisco are both doing VOIP TCP I'm curious if there > is actually a good reason for this or if it's just a case of the blind > leading the blind? > > As I said previously in this thread, SIP TCP _might_ make some sense > as long as you stripped the state tracking out of the SIP protocol > (which means it wouldn't actually be SIP anymore) but RTP over TCP? > Madness! > > I can think of only two reasons for this: > > a) Microsoft doesn't know jack about SIP/RTP so they wrote it using > TCP because they didn't know any better & Cisco wanted to be > compatible with Microsoft. > > b) Cisco firewalls aren't good at reliably tracking UDP state so they > decided to get around the problem by using TCP. > > If there is actually a good technical reason for voip over TCP I'd > love to hear it. > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
