[SIPForum-techwg] IP PBX section 15

[Francois Audet]

It's almost sufficient.

The key point is the 183 without SDP... That's the troublesome one. If
we clarified
that the paragraph you pointed out applied to 183 without SDP, it would
be perfect.

> -----Original Message-----
> From: Joanne McMillen [mailto:joanne at avaya.com] 
> Sent: Tuesday, January 10, 2006 13:01
> To: Audet, Francois [SC100:9T51:EXCH]; Paul Kyzivat
> Cc: Elwell, John; SIP Forum Tech WG; Chris Sibley
> Subject: Re: [SIPForum-techwg] IP PBX section 15
> 
> 
> Then I'm missing something because I would have expected the 
> current text 
> for this to apply:
> In addition to the response codes outlined above, PBX systems SHOULD 
> generate some form of call progress tone for the remaining 
> set of standard 
> SIP response codes (where a call progress tone is 
> applicable). Selection of 
> the particular tone is left to the equipment manufacturer's 
> discretion.
> 
> ----- Original Message ----- 
> From: "Francois Audet" <audet at nortel.com>
> To: "Paul Kyzivat" <pkyzivat at cisco.com>
> Cc: "Mcmillen, C Joanne (Joanne)" <joanne at avaya.com>; "Elwell, John" 
> <john.elwell at siemens.com>; "SIP Forum Tech WG" 
> <techwg at sipforum.org>; "Chris 
> Sibley" <Chris.Sibley at cbeyond.net>
> Sent: Tuesday, January 10, 2006 12:27 PM
> Subject: RE: [SIPForum-techwg] IP PBX section 15
> 
> 
> Any user will hangup if there is dead silence. It is basic 
> human interaction.
> 
> Let me say it differently:
> 
> On the Server side, we should encourage NOT sending 183s 
> without an SDP.
> 
> On the Client side, we should recommend some behavior if
> there is a 183 without an SDP. With the current text, you
> will get dead silence, and the user will hangup.
> 
> 
> 
> > -----Original Message-----
> > From: Paul Kyzivat [mailto:pkyzivat at cisco.com]
> > Sent: Tuesday, January 10, 2006 11:05
> > To: Audet, Francois [SC100:9T51:EXCH]
> > Cc: Mcmillen, C Joanne (Joanne); Elwell, John; SIP Forum Tech WG; 
> > Chris Sibley
> > Subject: Re: [SIPForum-techwg] IP PBX section 15
> >
> >
> > Why is dead silence not an option? The 180 says the other end is 
> > alerting and so it is appropriate to play ringback. All 183 says is 
> > that the other end is thinking about it - there is no guarantee
> > what it will
> > do. If it happens to be accompanied by inband audio then it
> > is fine to
> > play that. Otherwise you have no clue and ought not to be
> > playing ringback.
> >
> > (I guess you might play out the sound of relays clicking - 
> indicating 
> > "progress". Or of you have a GUI you could display a spinner.)
> >
> > Paul
> >
> > Francois Audet wrote:
> > > Sorry, "out-of-band" tone.
> > >
> > >
> > >>-----Original Message-----
> > >>From: techwg-bounces at sipforum.org 
> > >>[mailto:techwg-bounces at sipforum.org] On Behalf Of Audet, Francois 
> > >>[SC100:9T51:EXCH]
> > >>Sent: Tuesday, January 10, 2006 10:15
> > >>To: Mcmillen, C Joanne (Joanne); Elwell, John; SIP Forum Tech WG
> > >>Cc: Chris Sibley
> > >>Subject: RE: [SIPForum-techwg] IP PBX section 15
> > >>
> > >>
> > >>You need to alert with whatever outbound tone you want.
> > >>
> > >>Dead silence is not an option.
> > >>
> > >>
> > >>
> > >>
> > >>>-----Original Message-----
> > >>>From: Mcmillen, C Joanne (Joanne) [mailto:joanne at avaya.com]
> > >>>Sent: Tuesday, January 10, 2006 10:10
> > >>>To: Audet, Francois [SC100:9T51:EXCH]; Elwell, John; SIP
> > >>
> > >>Forum Tech WG
> > >>
> > >>>Cc: Chris Sibley
> > >>>Subject: RE: [SIPForum-techwg] IP PBX section 15
> > >>>
> > >>>
> > >>>Well, I agree with John - I don't think ringing is 
> appropriate for 
> > >>>anything except 180.
> > >>>
> > >>>-----Original Message-----
> > >>>From: techwg-bounces at sipforum.org
> > >>
> > >>[mailto:techwg-bounces at sipforum.org]
> > >>
> > >>>On Behalf Of Francois Audet
> > >>>Sent: Tuesday, January 10, 2006 9:43 AM
> > >>>To: Elwell, John; SIP Forum Tech WG
> > >>>Cc: Chris Sibley
> > >>>Subject: RE: [SIPForum-techwg] IP PBX section 15
> > >>>
> > >>>My point is that if you receive 183 (or anything else) 
> without an 
> > >>>SDP, then you can't do inband ringing.
> > >>>
> > >>>
> > >>>>-----Original Message-----
> > >>>>From: Elwell, John [mailto:john.elwell at siemens.com]
> > >>>>Sent: Monday, January 09, 2006 23:52
> > >>>>To: Audet, Francois [SC100:9T51:EXCH]; SIP Forum Tech WG
> > >>>>Cc: Chris Sibley
> > >>>>Subject: RE: [SIPForum-techwg] IP PBX section 15
> > >>>>
> > >>>>
> > >>>>Francois
> > >>>>
> > >>>>You wrote:
> > >>>>
> > >>>>>15.1
> > >>>>>
> > >>>>>There needs to be an explanation that receiving 183
> > >>>
> > >>>without and SDP
> > >>>
> > >>>>>should trigger Ringing tone (or in fact, any 18X without SDP).
> > >>>>>
> > >>>>
> > >>>>First, 180 should lead to ringback tone, but I don't
> > >>
> > >>think any other
> > >>
> > >>>>18x should. Secondly, this should be independent of whether
> > >>>
> > >>>there is
> > >>>
> > >>>>SDP present. It should, of course, be dependent on whether
> > >>>
> > >>>RTP/SRTP is
> > >>>
> > >>>
> > >>>>being received.
> > >>>>
> > >>>>John
> > >>>>
> > >>>>
> > >>>
> > >>>_______________________________________________
> > >>>techwg mailing list
> > >>>Send mail to: techwg at sipforum.org
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> > >>>http://sipforum.org/mailman/listinfo/techwg
> > >>>
> > >>>
> > >>>
> > >>>
> > >>
> > >>_______________________________________________
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> > >>
> > >>
> > >
> > >
> > > _______________________________________________
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> >
> >
> 
> 
>