Paul,
Hey, we're in luck! Only one side is required to initiate MSD:
8.2/H.323v3: "Master-slave determination shall be advanced (by sendingeither MasterSlaveDetermination or MasterSlaveDeterminationAck as appropriate) in the first H.245 message after Terminal Capability Exchange has been initiated."
So Dave and I got it right in Monterey. Thank heavens for that!
Note, however, that section 8.2 indicates that an EP cannot respond to the TCS message without first having sent its own TCS. Guessing how most stacks are probably written, it would probably not cause interoperability problems to first respond to the TCS then send your own TCS.
Take the usual line about being strict about what you do and lax about what you understand...
Regards, Chris -- Dr Chris Purvis -- Development Manager ISDN Communications Ltd, The Stable Block, Ronans, Chavey Down Road Winkfield Row, Berkshire. RG42 6LY ENGLAND Phone: +44 1344 899 007 Fax: +44 1344 899 001