Re: [Sip-implementors] Signaling indicating early media

2010-05-13 Thread Pranab Bohra
Hi, The answer to this question is - depends. The behavior of the UAS depends on various factors - 1.UAS may send SDP in a 183 response only if has been sent reliably (i.e. both the UAs should support PRACK) 2. If the UAS is a gateway (like PSTN gateway), it can decide to send 183 + SDP based on

Re: [Sip-implementors] 183 without SDP stops the local ringing

2010-05-13 Thread Paul Kyzivat
Arunachala wrote: > Doesn't RFC3960 talk about this very thing? Yes. I knew that was out there, but didn't remember the number. Thanks, Paul > -Arun > > On Wed, May 12, 2010 at 1:14 PM, Paul Kyzivat wrote: >> Technically, SDP in any 18x only serves to indicate where media sho

Re: [Sip-implementors] Signaling indicating early media

2010-05-13 Thread IƱaki Baz Castillo
2010/5/12 WORLEY, Dale R (Dale) : > It is an infamous problem with SIP that a UAC cannot determine whether early > media is arriving from any of the UASs -- UASs are not required to send any > signaling before sending early media. > > However, it has recently come to my attention that almost all

Re: [Sip-implementors] Is there a standard way to handle 0.0.0.0 in URIs

2010-05-13 Thread WORLEY, Dale R (Dale)
From: sip-implementors-boun...@lists.cs.columbia.edu [sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of Aaron Clauson [aa...@sipsorcery.com] Apologies if it's been asked previously but is there a specification anywhere that specifies how a SIP

Re: [Sip-implementors] Is there a standard way to handle 0.0.0.0 in URIs

2010-05-13 Thread Tomasz Zieleniewski
Hi, SIP URI host part must contain a valid numeric IP address. 0.0.0.0 is a reserved address called the "default route" used for IP routing. Allthough the SIP ABNF allows such address it is not valid from the point of view of it's usability because it is explicilty reserved and can't be used in IP

[Sip-implementors] Is there a standard way to handle 0.0.0.0 in URIs

2010-05-13 Thread Aaron Clauson
Apologies if it's been asked previously but is there a specification anywhere that specifies how a SIP user agent should handle requests that have a URI host of 0.0.0.0? It seems to be common practice to treat 0.0.0.0 as a blackhole address and therefore a request destined for that host should be