Multi-Tech Systems MVP-3010, MVP-2400, MVP-2410 manual 509

MultiVOIP User Guide			Embedded Gatekeeper
	Network Parameter Definitions (cont’d)
	Field Name	Values	Description
	Configuration
	Parameters
	Call IRQ		The interval, in seconds, between IRQ
	Interval		messages sent by the Gatekeeper to query
			the status of calls. IRQ messages are sent
			to all online endpoints registered as
			dynamic and having ongoing calls in
			order to verify that the calls are still
			ongoing. The number you set determines
			the delay between two IRQ messages to
			the same endpoint regarding the same
			call. Choosing the desired delay should
			take into account the following factors:
			IRQ messages add to the traffic already
			present over the network, and the shorter
			the delay, the more IRQ messages are
			sent. However, the longer the delay, the
			longer it takes for the Gatekeeper to
			detect calls that are stale.
			The delay parameter relates to the
			interval between two IRQ messages per
			one call, so the actual number of the IRQ
			messages the Gatekeeper creates during
			this interval should be multiplied by the
			number of ongoing calls registered
			dynamically.
			To disable the IRQ polling, set this value
			to zero.
			The effective IRQ interval cannot fall
			below three times the RAS timeout.
			IRQ messages will not be sent at a rate
			exceeding 20 per second.

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