Hi All, I think I agree with Inder's analysis that we can support two types of connection request, immediate and advanced, as long as these two services have some constraints which I have summarized in this table: Service type startTime endTime State change State change Res->Sch Sch->Prov Immediate string: '0' >startTime asap Signalled only Advanced >Now + guardTime >startTime <startTime Signalled & local All other state changes are fixed: I -> Res: occurs as soon as the connection request is received Prov -> IS: occurs as soon as provisioning has been completed by NRM IS -> Rel: occurs after Cancel request has been processed. Note 1: '<' means before, '>' means after Note 2: A Connection has following states: Idle (I), Reserving (Res), Scheduled (Sch), Provisioning (Prov), In-service (IS), Released (Rel). The question for v1.0 is do we need to support the immediate mode or can we use near-immediate mode where we set the startTime close to 'now'? Guy ------------------------------------------------------------------------------------------------------------------ Guy Roberts, Ph.D Network Engineering & Planning DANTE - www.dante.net<http://www.dante.net/> Tel: +44 (0)1223 371 316 City House, 126-130 Hills Road Cambridge, CB2 1PQ, UK ------------------------------------------------------------------------------------------------------------------