G729 payload preferred

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Apr 18th, 2007
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Hi Guys,


I have a customer that require codec payload of G729 with 40 byte/ms toward a particular voice gateway. The gateway is MGCP gateway. Under service parameter of the call manager i have found "Preferred G729 Millisecond Packet Size :" but the question is, if Preferred means that if i change this payload from default (20ms) to 40(ms) all call are affected but can work also with endpoint that support only G729 with 20 Byte/ms? or work with endpoint with only 40 byte? i have no found information about that and unfortunatly i can't try.

Any update is appreciate.


Thank's


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gmarogi Tue, 04/24/2007 - 06:19
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with G729 40ms IP-phone to IP-phone connection within the same CCM is possible but if IP IVR is there the maximum possible payload size is 30ms

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