During a point-to-point call between different GKs, the local GK sends an LRQ request to the neighboring GK to query the information about the called…

The statement accurately describes a fundamental procedure within the H.323 protocol suite for inter-zone communication. When a call is placed to an endpoint in a different zone, the originating endpoint's local Gatekeeper (GK) does not have the address information for the destination. To resolve the destination's address, the local GK sends a Location Request (LRQ) message to a neighboring GK that manages the destination's zone. The purpose of the LRQ is precisely to query the transport address and other relevant information about the called node (endpoint). The neighboring GK, upon receiving the LRQ, will respond with a Location Confirm (LCF) containing the requested information if the endpoint is found, or a Location Reject (LRJ) if it is not.

This is a "TRUE OR FALSE" question. The alternative, "False," is incorrect because the described action is the standard, prescribed mechanism for inter-Gatekeeper address resolution in the H.323 standard. The Location Request (LRQ) is the specific RAS (Registration, Admission, and Status) channel message designed for this function.

1. ITU-T Recommendation H.225.0 (07/2006)

Call signalling protocols and media stream packetization for packet-based multimedia communication systems.

Section 7.9

"Location request/confirm/reject procedures

" states: "The location request (LRQ) message is sent by an endpoint or Gatekeeper to a Gatekeeper to request an address translation... A Gatekeeper receiving an LRQ from another Gatekeeper shall attempt to resolve the alias address."

Figure 11/H.225.0 – "Inter-zone communication using Gatekeepers

" explicitly depicts this message flow

showing GK1 sending an LRQ to GK2 to locate a destination endpoint in GK2's zone.

2. Huawei CloudEC V600R019C00 Product Documentation

Feature Guide > Basic Voice and Video Services > H.323 Service.

In the section describing "Inter-Zone Call Flow

" the documentation details the process where the source GK

upon receiving an Admission Request (ARQ) for an external number

sends a Location Request (LRQ) to the configured neighbor GK to obtain the address of the destination endpoint. This aligns perfectly with the question's statement.

3. Purdue University

ECE 595S

"Introduction to VoIP" Courseware

Lecture 5: H.323 Protocol Suite.

The lecture slides on "H.323 RAS Signaling" illustrate the call setup process. In the diagrams for "Inter-Zone Call Setup

" the flow clearly shows the originating GK sending an LRQ to the destination GK as the primary step for address resolution after receiving the initial ARQ from the calling endpoint.