Multi-Tech Systems MVP-2400, MVP-2410, MVP-3010 manual 486

Embedded Gatekeeper MultiVOIP User Guide

Summary of H.225 RAS Messages (cont’d)

Address Translation	An LRQ is a request message between two
Messages for	H.323 gatekeepers to find the address of an
Out-of-Zone Calling	H.323 endpoint. One gatekeeper is requesting
	the address translation services of the other.
	If the request is granted, an LCF message is
	returned.
	If the request is denied, an LRJ message is
	returned.
LRQ	Location Request.
LCF	Location Confirmation.
LRJ	Location Request Rejection.
Registration Control	With an RRQ, an endpoint asks to be a
Messages	participant in the network zone controlled by
	the gatekeeper. The gatekeeper can either
	grant the request (by sending an RCF
	message )
	or deny the request
	(by sending an RRJ message).
	If an endpoint’s registration with the
	gatekeeper is temporary, its duration is
	specified in a TimeToLive field in the RCF
	message sent by the gatekeeper. After the
	registration duration has elapsed, the
	gatekeeper will send two IRQ messages (see
	“IRQ Interval” field in the Network
	Parameters screen) to see if the endpoint is
	still “alive.” If the endpoint responds with an
	IRR, the registration will be extended. If not,
	the gatekeeper will send a URQ message to
	terminate the endpoint’s registration.
	Thereafter, the endpoint must re-register with
	a full RRQ.
RRQ	Registration Request.
RCF	Registration Confirmation.
RRJ	Registration Rejection.

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