Gatekeeper Transaction Message Protocol

What Does Gatekeeper Transaction Message Protocol Mean?

Gatekeeper Transaction Message Protocol (GKTMP) is a protocol that is used between the Cisco IOS Gatekeeper and a server to provide enhanced call routing and address translation services.


Techopedia Explains Gatekeeper Transaction Message Protocol

Cisco gatekeepers use different signaling methods to render redundancy, control capability and extensibility of an H.323 network. One key method is the Gatekeeper Transaction Message Protocol (GKTMP). Gatekeepers are H.323 devices that provide services (such as bandwidth management, admission control and address translation, etc.) to facilitate network scalability. These services are provided for H.323 terminals and multipoint control units. Such gatekeeper features are generally supported for the Cisco 2600, 3600, 2800, 3800 and 7200 family. Gatekeepers improve scalability and management and use the RAS protocol to communicate with Cisco voice gateway.

The GKTMP Interface Resiliency Enhancement feature incorporates additional parameters, such as call duration, start time and reason for field connection in Request DRQ messages, which are sent from gatekeeper to server. The server then uses these messages for billing and accounting functions. They allow the gatekeeper to identify unavailable servers and route them to alternate servers.


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Margaret Rouse is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical, business audience. Over the past twenty years her explanations have appeared on TechTarget websites and she's been cited as an authority in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine and Discovery Magazine.Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages. If you have a suggestion for a new definition or how to improve a technical explanation, please email Margaret or contact her…