I think that they just need people sending them emails saying "Company X demonstrated G.723.1 interoperability with Company Y". Some people have started to send those to Stephen Casner [casner@acm.org]. He's looking for people who implemented the early version of H.263-1996 and GSM-HR and GSM-EFR. If you do, respond, because they will remove the payload type... -----Original Message----- From: Rex Coldren [mailto:coldrenr@agcs.com] Sent: Wednesday, March 14, 2001 11:37 AM To: Audet, Francois [SC2:4K02:EXCH] Cc: ITU-SG16@mailbag.cps.INTEL.COM Subject: Re: FW: [VoIP-list] FW: [Fwd: AVT WG last call on RTP spec and profil e] Francois, I believe you are correct. However, I am not familiar with how the IETF determines "interoperable implementations". Is is simply a matter of vendors reporting with whom they interoperate or is there some IETF-sponsored interop event that needs to be attended? Rex Francois Audet wrote: Guys,This payload type = 4 for G.723.1 has been in H.225.0 for many years. Don't we have many interoperable H.323 products using PT=4 for G.723?Won't it be a major interoperability problem if this payload type is removed from the A/V specification?????> -----Original Message-----

From: Simao Campos-Neto [ mailto:simao.campos@LABS.COMSAT.COM <mailto:simao.campos@LABS.COMSAT.COM> < mailto:simao.campos@LABS.COMSAT.COM <mailto:simao.campos@LABS.COMSAT.COM> > ] Sent: Friday, March 09, 2001 8:27 AM To: ITU-SG16@MAILBAG.INTEL.COM Subject: [Fwd: AVT WG last call on RTP spec and profile]

Dear colleagues,

please see in the attached that audio payload formats for G.723.1, called there "G723", has been removed from the latest RTP A/V profile because of the lack on information that interoperable implementations of them exist. Other audio payload formats have also been removed, e.g. H263 (this is not the same as H263-2000), GSM-HR, GSM-EFR, If you know of such implementations, there is still some VERY short time (less than 2 weeks) before the IETF issues the repeat WG last call. Please provide any such information directly to Stephen Casner <casner@acm.org>.

Best regards, Simao.