All,

H.323 version 2 states in 8.4.3.1 A2d) and 8.4.3.4 that an MCU can use conferenceListChoice to give a version 2 endpoint the choice between a number of possible conferences of which one it would like to create(!). I have two points with regard to this: 1. Surely it would also be sensible to have a similar method for joining extant conferences (rather than just sending ReleaseComplete when CIDs don't match)? Would'nt this be an easy (no extra ASN.1!) and useful addition? 2. (more serious) I can't see how an endpoint tells the MCU which conference from the list it has chosen! Is it up to the endpoint to release the call and send a new setup message with the appropriate conference alias in, or does it send back a similar facility message to the one it was sent, with a single ConferenceList in rather than a sequence of same?

Chris ---------------------------------------- Dr Chris Purvis - Senior Development Engineer, WAVE CC Software Madge Networks Ltd, Wexham Springs, Framewood Road, Wexham, Berks. Phone:+44 1753 661359 email: cpurvis@madge.com