Dynamic channel allocations 197Dynamic channel allocationsBy default, CallPilot allocates channels to services dynamically, based onavailable channel resources. For most systems, this default configurationworks very efficiently.ATTENTIONThe total number of channels available for any CallPilot system iskeycode-controlled. If you need more channels, upgrade your CallPilot server.ATTENTIONThe minimum and maximum channel criteria pertain to the channel media typeonly (Voice, Fax or ASR) being used to process this type of service, and hasnothing to do with DS30 channels (Multimedia, Access or IVR).The default minimumThe minimum number of channels allocated to each service is zero. Thismeans that services are not guaranteed access to any channels. Otherservices are allowed to use all of the channels of a particular type (such asfax), leaving no available channels.How the default minimum channel allocation for a service works• When a Fax on Demand service is configured with the default minimumchannel allocation of zero (0), no channels are dedicated to this service.• Whenever all fax channels on the system become busy due to trafficgenerated by other fax services, a call in to the Fax on Demand serviceis queued until a fax channel becomes idle.The default maximumBy default, the maximum number of channels that a service can use at anyone time is all channels of the required type.How the default maximum channel allocation for a service works• Four fax channels are on your system. A Fax on Demand service isconfigured with the default maximum channel allocation. This meansthat no fax channels are reserved for other fax services.• Whenever a burst of traffic is directed at the Fax on Demand service,this service is allowed to use all available fax channels simultaneously,leaving no channels available to other fax services.Allocations for applications with fax callbackIf the session profile for an application allows fax callback delivery, thechannel allocations assigned to the service SDN are not used. Instead, thechannel allocations assigned to the DTF SDN are used, because the DTFservice delivers faxes on a callback.Nortel CallPilotAdministrator GuideNN44200-601 01.11 Standard5.0 9 November 2007Copyright © 2007, Nortel Networks.
