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H.323 Gatekeeper Zones to control compression G.722 and G.711

How do I control the use of compression G.722 and G.711 on CUCM 7.1 with Gatekeeper Zones.

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Cisco Employee

Re: H.323 Gatekeeper Zones to control compression G.722 and G.71

Codec negotation is a feature of H.245, which is directly between gateways.  H.245 is not terminated or passed through a GK.  Hence, you cannot use a GK to control codec negotiation of a call.

The only way to get that to work is to hairpin all calls through the GK to go through a CUBE (IP-to-IP GW) located on the same box as the GK.  Note that when doing this, you will have RTP traffic terminating through the CUBE/GK box.  That is done with this command:

zone remote gatekeeper-name domain-name [ras-IP-address] [invia inbound-gatekeeper | outvia outbound-gatekeeper [enable-intrazone]]

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