Re: [Sip-implementors] Can EP send media only peer supports

2009-08-17 Thread T Satyanarayana-A12694
-Original Message- From: Dale Worley [mailto:dwor...@nortel.com] Sent: Tuesday, August 18, 2009 1:37 AM To: T Satyanarayana-A12694 Cc: Paul Kyzivat; sip-implementors@lists.cs.columbia.edu Subject: RE: [Sip-implementors] Can EP send media only peer supports On Sat, 2009-08-15 at 23:35 +

Re: [Sip-implementors] Can EP send media only peer supports

2009-08-17 Thread Paul Kyzivat
Dale Worley wrote: > On Sat, 2009-08-15 at 23:35 +0800, T Satyanarayana-A12694 wrote: >> Additional round trips should be made optional (only for implementations >> having concurrent codecs limitation). >> >> Additionally, why can't the spec be modified (or place in a BCP): >> 1. to allow only a

Re: [Sip-implementors] Significance of History info in 18x response

2009-08-17 Thread Paul Kyzivat
Bhaskar Dutta wrote: >> I had a doubt on History-info header present in Sip 18x Responses. >> >> Are the History-info headers UAC received in 18x response useful to an >> application or user ? >> >> If yes can you please quote an example where its useful to an >> application/user . This is entir

Re: [Sip-implementors] Can EP send media only peer supports

2009-08-17 Thread Dale Worley
On Sat, 2009-08-15 at 23:35 +0800, T Satyanarayana-A12694 wrote: > Additional round trips should be made optional (only for implementations > having concurrent codecs limitation). > > Additionally, why can't the spec be modified (or place in a BCP): > 1. to allow only a sub-set (of what is presen

Re: [Sip-implementors] Significance of History info in 18x response

2009-08-17 Thread Bhaskar Dutta
> I had a doubt on History-info header present in Sip 18x Responses. > > Are the History-info headers UAC received in 18x response useful to an > application or user ? > > If yes can you please quote an example where its useful to an > application/user . > > How should the UAC's treat these HI

Re: [Sip-implementors] Can EP send media only peer supports

2009-08-17 Thread T Satyanarayana-A12694
Paul, I haven't seen SIPit collecting stats at this level (it is usually at feature level). But, it will be a good exercise to collect this at next SIPit or even solicit implementor opinion on this mailing list. Regards Satya T -Original Message- From: sip-implementors-boun...@lists.cs.c

Re: [Sip-implementors] SDP silence suppression negotiation

2009-08-17 Thread T Satyanarayana-A12694
AFAIK, this is not valid. >From RFC3555, annexb: indicates that Annex B, voice activity detection, is used or preferred >From RFC3108, silenceSupp: indicates the use or non-use of silence suppression (The second one is less used and may not be understood by many implementations). In your example

Re: [Sip-implementors] 18X response with no Contact Header

2009-08-17 Thread Vikram Chhibber
We can not see the attachment. A UAC should have no problem processing a unreliable 18x response without Contact as it is optional. It is definitely needed in a reliable 18x as without it, a UAC can not construct a PRACK request. In this case, 18x will timeout and the early dialog will be terminate

[Sip-implementors] SDP silence suppression negotiation

2009-08-17 Thread Rajpal Dangi
Hi All, While negotiating G729 codec is it valid to have "annexb=yes" and "silenceSupp:off" in the initial offer being offered assuming that far end supports all of these capabilities? For example: m=audio 8804 RTP/AVP 18 0 101 a=rtpmap:0 PCMU/8000 a=rtpmap:18 G729/8000 a=fmtp:18 annexb=ye

Re: [Sip-implementors] Can EP send media only peer supports

2009-08-17 Thread Paul Kyzivat
Rockson Li (zhengyli) wrote: > Paul, > > If I catch you clearly, do you mean this is a real bug in RFC3264? IMO this is unclear. It might be that what is written is not exactly what the original authors intended. Or maybe it is as intended but isn't what people now wish had been written. Eit

Re: [Sip-implementors] 18X response with no Contact Header

2009-08-17 Thread Brett Tate
The attachment didn't survive the lists filtering. The answer can likely be found on the following thread: https://lists.cs.columbia.edu/pipermail/sip-implementors/2008-August/020062.html > -Original Message- > From: sip-implementors-boun...@lists.cs.columbia.edu [mailto:sip- > implemen

[Sip-implementors] 18X response with no Contact Header

2009-08-17 Thread raikkme rrrrr
What should be the behaviour, in case 18X response is received with no Contact header for the below case? Please refer the attached document for sample scenario. The entity is behaving as a B2B, where BYE is received from one side. Thanks, kumar ___ Si

[Sip-implementors] 18X response with no Contact Header

2009-08-17 Thread raikkme rrrrr
What should be the behaviour, in case 18X response is received with no Contact header for the below case? Please refer the attached document for sample scenario. The entity is behaving as a B2B, where BYE is received from one side. Thanks, kumar ___ Si

Re: [Sip-implementors] SIP OPTIONS

2009-08-17 Thread Harsha Ramanagoudra
Session Timers detect availability of session and is restricted to an existing dialog. On the other hand, OPTIONS can be used outside of a dialog(session/call) independently, to determine the larger availability of SIP UA at the far end, even if on a per hop basis. Both Session Timers and OPTI

[Sip-implementors] Significance of History info in 18x response

2009-08-17 Thread Divya Rao
Hi All, I had a doubt on History-info header present in Sip 18x Responses. UACUAS | | |- INVITE -- -->| | Supported:

[Sip-implementors] Question regarding translation of ISUP redirecting reason to SIP Diversion reason

2009-08-17 Thread Yael Peery
Hello I have a question about translating ISUP redirecting reason values to SIP Diversion reason values. In draft-levy-sip-diversion-10 section 10.1 there is a limited list of translations between ISUP and SIP diversion reason codes: ISUP/ISDN reason code Diversion reason code 00

Re: [Sip-implementors] Can Reason header be inluded in 18x and 200 OKresponses to INVITE ?

2009-08-17 Thread Kapil Saxena
Hi Indresh: Thanks for explanation. On your following point, lets consider another scenario for SIP->PSTN > But let us say for some reason if the orginating guy is interested in > uniquely knowing the ISUP side cause value and reason rather than > referring to > this ISUP-SIP