How much time goes by between the 100 and the final response? I think it should be Timer B ( generally 32 secs. )
-----Original Message----- From: Daniel Corbe [mailto:[EMAIL PROTECTED] Sent: Thursday, March 08, 2007 5:26 PM To: Sunil Kumar Verma Cc: 'Paul Kyzivat'; Sarkar, Uttam; [email protected] Subject: Re: [Sip-implementors] 180 Ringing from Proxy(BBUA) So what happens is you get a 100, no further provisional responses for a lengthy period of time followed by a final response? (2xx, 3xx, 4xx, 5xx, 6xx) How much time goes by between the 100 and the final response? BTW I meant that it would be an interesting draft to author.. AFAIK no such document currently exists. On Mar 8, 2007, at 5:23 PM, Sunil Kumar Verma wrote: > > > No i am not getting any response because of which there is deaf > silence. > Is there any way to resove this scilence?? > Thanks for the draft. I will read it. > > > -----Original Message----- > From: Daniel Corbe [mailto:[EMAIL PROTECTED] > Sent: Thursday, March 08, 2007 4:59 PM > To: Sunil Kumar Verma > Cc: 'Paul Kyzivat'; 'Sarkar, Uttam'; [email protected] > Subject: Re: [Sip-implementors] 180 Ringing from Proxy(BBUA) > > > What are you trying to fix? Are you not getting ring indicator tone > back from one of your carriers? > > In practice you shouldn't be generating any provisional responses > except for 100 Trying. In the voice world at least this is generally > regarded as a bad idea. > > RFC3261 specifically makes no distinction between a proxy and a B2BUA > other than this: > > 6 Definitions > > Back-to-Back User Agent: A back-to-back user agent (B2BUA) is a > logical entity that receives a request and processes it as a > user agent server (UAS). In order to determine how the > request > should be answered, it acts as a user agent client (UAC) and > generates requests. Unlike a proxy server, it maintains > dialog > state and must participate in all requests sent on the > dialogs > it has established. Since it is a concatenation of a UAC > and > UAS, no explicit definitions are needed for its behavior. > > So "proxy" and "b2bua" are very ambiguous. Based on that definition, > one would be going out on a limb to say "A B2BUA can do more than a > proxy can." > > The differentiator between a B2BUA and a Proxy Server IMHO is the > session mediation features you typically find in a B2BUA such as call > routing, answer/disconnect supervision, etc. Mediation is not defined > by RFC3261, only Initiation. > > An interesting draft to see would be "Session Mediation with the > Session Initiation Protocol and Session Description Protocol" > > Cheers > -Daniel > > On Mar 8, 2007, at 4:46 PM, Sunil Kumar Verma wrote: > >> >> Thanks Paul and Uttam. >> >> I have B2BUA, so we can say that B2BUA can generate 180 RINGING for >> the call which are yet to be answered at the far end?? >> Caller receives ringback tone only if the called party is ringing.. >> Think of a scenario.. >> if the called user has voice mail configured and due to some >> network problem his client >> ,after registering to B2BUA, is out of network. The B2BUA still >> consider that the user is available >> and if somebody tries to reach that user he hear deaf silence and >> then after 10 to 15 sec the call goes to Voice mail. >> Is there any way we can avoid the deaf scilence in case of B2BUA? >> >> Regards >> Sunil Verma >> >> >> >> >> >> >> >> -----Original Message----- >> From: Paul Kyzivat [mailto:[EMAIL PROTECTED] >> Sent: Thursday, March 08, 2007 3:36 PM >> To: Sarkar, Uttam >> Cc: Sunil Kumar Verma; [email protected] >> Subject: Re: [Sip-implementors] 180 Ringing from Proxy(BBUA) >> >> >> >> >> Sarkar, Uttam wrote: >>> Nope. It can send 100 Trying. >>> 180 would have "totag" that would create a dialog. Without getting >>> any reponse from client B. You can't create a dialog. >> >> That is correct answer for a proxy. For a B2BUA almost anything is >> possible. It depends on what the B2BUA is trying to accomplish. >> >> Paul >> >>> -----Original Message----- >>> From: [EMAIL PROTECTED] >>> [mailto:[EMAIL PROTECTED] On Behalf Of Sunil >>> Kumar Verma >>> Sent: Thursday, March 08, 2007 1:52 PM >>> To: [email protected] >>> Subject: [Sip-implementors] 180 Ringing from Proxy(BBUA) >>> >>> >>> >>> Hi, >>> >>> In case of BBUA, is it possible for proxy to generate 1xx >>> response for an INVITE, before receiving any reply from >>> terminating SIP client. >>> For Ex. SIP client A calling another SIP client B, and before >>> receiving any reply from the SIP client B for the initial >>> INVITE, can proxy generate 180 RINIGING reply? >>> >>> Thanks >>> Sunil verma >>> >>> >>> >>> >>> >>> >>> The information contained in this electronic message and any >>> attachments to this message are intended for the exclusive use of >>> the >>> addressee(s) and may contain proprietary, confidential or privileged >>> information. 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The company accepts no liability for any damage >>> caused by any virus transmitted by this email. >>> >>> www.wipro.com >>> >>> _______________________________________________ >>> Sip-implementors mailing list [email protected] >>> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors >>> >>> _______________________________________________ >>> Sip-implementors mailing list [email protected] >>> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors >>> >> >> >> >> The information contained in this electronic message and any >> attachments to this message are intended for the exclusive use of the >> addressee(s) and may contain proprietary, confidential or privileged >> information. If you are not the intended recipient, you should not >> disseminate, distribute or copy this e-mail. Please notify the sender >> immediately and destroy all copies of this message and any >> attachments. >> >> WARNING: Computer viruses can be transmitted via email. The recipient >> should check this email and any attachments for the presence of >> viruses. The company accepts no liability for any damage caused by >> any virus transmitted by this email. >> >> www.wipro.com >> _______________________________________________ >> Sip-implementors mailing list [email protected] >> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > > The information contained in this electronic message and any > attachments to this message are intended for the exclusive use of the > addressee(s) and may contain proprietary, confidential or privileged > information. If you are not the intended recipient, you should not > disseminate, distribute or copy this e-mail. Please notify the sender > immediately and destroy all copies of this > message and any attachments. WARNING: Computer viruses can be > transmitted via email. The recipient should check this email and any > attachments for the presence of viruses. 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