I recommend to keep the two Progress indicators since both public and private ISDNs (QSIG) allow it, so the H.323 gateway should allow it as well. Especially if a private ISDN is involved there are cases where a 2nd progress indicator can occur. Ernst Horvath Siemens AG
-----Ursprüngliche Nachricht----- Von: Christian Groves [mailto:Christian.Groves@ERICSSON.COM] Gesendet am: Donnerstag, 28. Oktober 1999 23:33 An: ITU-SG16@mailbag.cps.intel.com Betreff: H246annexC Progress Indicators
G'Day,
In my H246 annex C draft recommendation section C.6.1.4.2 I've said that an Alerting and Progress can contain two progress indicator elements. I can't find anything in H.225 or H.323 that forbids this.
ie. Progress indicator Progress indicator information elements possibly present in the access transport parameter of the Call Progress Message (CPG) are transferred into the message sent to the calling user. If the calling user is a H.323 end system it need not interpret this information element. In addition, progress indicator information elements are created by the Interworking function according to the coding of the Call Progress Message (CPG). Table 15 shows the sending criteria of each value. Every message sent to the access (ALERTING or PROGRESS) may contain two progress indicator information elements. When more than two progress indicator information elements are to be sent, the supplementary progress indicator information elements are sent in a PROGRESS message.
Are people happy to leave this in or do you only want to see one supported??
Cheers, Christian