When we agreed on the Annex F SET device way of third party initiated pause and re-routing (FACILITY message with empty FastStart structure), I mentioned that this should not be limited to Annex F devices but should of course also be possible for non-Annex F H.323 devices that support fastStart. This possibility should be added to 8.4.6 of H.323.

Especially since we do it already in 9.10 for voice-to-fax switching.

I'll bring up a contribution on it in Osaka.