Gateway has nothing to choose. The region configuraiton is part of Device pool assigned to Gateway. So if Ip phone calling from same device pool, it will use G711 and if Ip phone calling another device pool it will use G729. Offcourse this has to be configured in Region configuration and not in gateway configuration.
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Typically, G.711 is used when BW is not an issue. For example, Phone A and Phone B are in the same site/campus and you assign them to a region "HQ". You should set G.711 for the HQ relationship with itself.
Typically, G.729 is used when BW is an issue. For example, Phone A in HQ region needs to talk with Phone C in a branch office (Phone C is assigned to "BR1" region). If BW is low, then you should set G.729 for the relationship between HQ and BR1.
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
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