H.323 Overview

Owned by Kelli Higdon
Last updated: Apr 02, 2024
2 min read

 

The IMG 2020 supports H.323 Version 2 inbound and outbound gatekeeper (Direct) and gatekeeper (Routed) call scenarios. The diagrams and call flows display a few but not all of the call flow scenarios supported.

Gateway to Gateway Call - No Gatekeeper Involved

No RAS signaling when a gatekeeper is not included.

 

  

Gatekeeper Direct - Both Endpoints Registered to Same Gatekeeper

Diagram displays IMG 2020 on outbound and inbound leg. Call Flows for gatekeeper (Direct) are displayed directly below the diagram.

 

Both Endpoints Register to Same Gatekeeper (Direct)

Only Calling Endpoint has Gatekeeper (Direct)

 

 

Both Endpoints Registered to Different Gatekeeper (Direct)

Only Called Endpoint Registered to the Gatekeeper (Direct)  

 

The diagram above displays only one gatekeeper. The call flow displays two gatekeepers although the call flow is considered a Direct Routing scenario.

Gatekeeper (Routed) - Both Endpoints Registered to Same Gatekeeper

The diagram displays the IMG 2020 on outbound and inbound leg. Call Flows for the Gatekeeper (Routed) are displayed directly below the diagram.

Only Calling Endpoint has Gatekeeper (Routed)  

Both Endpoints Registered to the Same Gatekeeper  (Routed)

 

Only Called Endpoint Registered to Gatekeeper (Routed)

 

 

 

 

 

 

 

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