Capacities

The following are capacities and limitations for conference feature, including the conference established during route optimization:

Maximum Number of Participants in a Conference = 8.
Maximum Number of External Lines in a Conference = 8.
Maximum Number of Public Trunks in a Conference = 8.
Number of Virtual Multi-Party Board, "MPU" per Media Gateway = 4.
Maximum Number of Participants in a Multi-Party connection in a Media Gateway = 96.
Number of multi-party individuals on one TMU = 24.
The conference circuit is a common system resource for calls to Emergency extensions, conference calls, intrusion, route optimization calls and PBX-operator calls. Emergency extension requires eight resources and intrusion occupies three resources and each Operator requires four resources. The number of available resources per device board at any given time is: = (q - u - nx8 - mx4 - kx3)

	with q=	number of multi-party resources on the device board,
	u=	number of resources used for conference including conferences established due to route optimization,
	n=	number of Emergency extensions,
	m=	number of Operators initiated in the Media Gateway,
	k=	number of intrusion calls.

All participants in a conference must be connected to resources of the same device board or media gateway.
Conference is only applicable for voice calls.