Perhaps I wasn't clear enough. I certainly see the statements that 1xx responses may contain bodies. But I do NOT any longer see the implication that existance of the body terminates any local ringtone (which was explicit before). I know that a body can setup a media path for inband tones, but if the originating UAC initiated ringtone from a 180 that did NOT contain a body, is it still clear that a 183 with a body stops the locally generated tone?
I am also curious about whether terminating an existing media stream (e.g., 180 with SDP containing m line with 0 port after a 183 with media) should restart a local ringback tone. Alan Johnston wrote: > Terry, > > It is now covered in 21.1: > > "Provisional (1xx) responses MAY contain message bodies, including > session descriptions." > > and in 21.1.5: > > "The 183 (Session Progress) response is used to convey information about > the progress of the call that is not otherwise classified. The > Reason-Phrase, header fields, or message body MAY be used to convey more > details about the call progress." > > Note that SDP in a 1xx can mean many things, not just inband alerting or > progress tones. > > For more details of how to use 183 and 180 for PSTN interworking, see > draft-ietf-sipping-isup-00.txt. > > Thanks, > Alan Johnston > WorldCom > sip:[EMAIL PROTECTED] > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED]] On Behalf Of > > Terry L Anderson > > Sent: Thursday, February 28, 2002 3:42 PM > > To: SIP Implementors > > Cc: Jonathan Rosenberg > > Subject: [Sip-implementors] Ringtone and 1xx > > > > > > Up through bis-04 there was a statement in Informational 1xx > > section that stated: > > > > "If a 1xx response contains a session description, a UAC > > SHOULD cease generating local ringback tone." > > > > This was omitted beginning with bis-05 and I find no > > equivalent statement elsewhere. Was this omission intended > > to imply a removal of this behavior or have I missed where > > this is now stated? > > > > -- > > > > ------------------------------------------------------------ > > Terry L Anderson mailto:[EMAIL PROTECTED] > > Tel:908.582.7013 Fax:908.582.6729 > > Lucent Technologies/INS/Voice Over IP Access Networks > > Rm 2B-121, 600 Mountain Av, Murray Hill, NJ 07974 > http://its.lucent.com/~tla (Lucent internal) http://www.gti.net/tla -- ------------------------------------------------------------ Terry L Anderson mailto:[EMAIL PROTECTED] Tel:908.582.7013 Fax:908.582.6729 Lucent Technologies/INS/Voice Over IP Access Networks Rm 2B-121, 600 Mountain Av, Murray Hill, NJ 07974 http://its.lucent.com/~tla (Lucent internal) http://www.gti.net/tla
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