> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > On Behalf Of [EMAIL PROTECTED] > Sent: 02 September 2008 15:52 > To: [EMAIL PROTECTED] > Cc: [email protected] > Subject: Re: [BLISS] Alert-Info URNs > > Hello Denis, > > Please see inline: > > -----Original Message----- > From: ext Alexeitsev, D [mailto:[EMAIL PROTECTED] > Sent: 02 September, 2008 17:26 > To: Mutikainen Jari (Nokia-D-MSW/Helsinki) > Cc: [email protected] > Subject: AW: [BLISS] Alert-Info URNs > > Hi Jari > > Comments inline > > Hello, > > In my understanding the Alert-Info has been specified for > INVITE and 180 > only. Quite many of the examples below do not make sense in INVITE or > 180. > > [DA] Could you point to the examples that make no sense? > > > [Jari] If I start from the top of the list, there are high > tone and low > tone, which I have no idea what they are. Then the next one is dial > tone, so let's concentrate on this. Dial tone is a tone which is given > to the caller when he/she picks up the phone, before making any > dialling. By hearing the dial tone, the caller knows the > "line is free". > This is implemented only in legacy fixed phones, e.g. mobile phones do > not have a dial tone. What meaning the sending of the dial tone could > have in INVITE or 180? Once the INVITE hits the callee, the playing of > the dial tone to the caller has been discontinued a long time ago. How > about 180, does it indicate that the dial tone should be played to the > caller in alerting phase? > > > In any case, to me it seems that the CW is the only real problem what > needs to be solved in this I-D, everything else seems to be imaginary, > is there really a need for a generic framework? > > [DA] Do you have a proposal on how to solve the issues > without having a > generic framework? > > [Jari] Yes, let's use 181+180, or if that is not sufficient for some > reason (which reason I would like to read from the I-D), 180 with > Alert-Info with a CW indication.
> > In addition, the I-D could describe why 181 is not sufficient > solution. > > [DA] What use case do you have in mind that can be solved by > using 181? > > [Jari] The CW use case: how to indicate to the caller that > the callee is > alerting but busy with another call. I think this was the original > problem to be solved? [JRE] What is the relevance of 181 (Call is Being Forwarded)? Perhaps you meant 182 (Queued)? John _______________________________________________ BLISS mailing list [email protected] https://www.ietf.org/mailman/listinfo/bliss
