Following a restart of the conference server, conference that were created earlier on can onlmy be found in the database. In such a case, the object LocalConference must be recreated from scratch once the server receives an INVITE for one of them.
There are 2 possible scenarios:
- a participant wants to join the conference: time boundary is set to 0 0 (in the SDP: t=0 0) -> conference recreated using the conference information stored in the database
- an admin wants to update the conference: time boundary is not 0 0 -> conference recreated using the SalCallOp informations. Note that if the list of participants is empty, the conference will be cancelled

Do not create streams if the invite session is only used to create a conference on the server to prevent a ms2 graph being created