If you put the commands I suggested onto your 1760s, then you can use the regions in CallManager to set the codec you want between those regions and the 1760 will be able to accept them. So depending on your region setup you may have any of these combinations and it will work:
local ip phone >> remote ipphone ==== g729
local ip phone >> remote ipphone ==== g711
local ip phone >> remote gateway ==== g729
local ip phone >> remote gateway ==== g711
If you have two sites(for example), you could have all gateways and phones from one site in region A, all from the other site in Region B, then have g729 configured between the regions and G711 within each region. You shouldn't need to use G711 accross the WAN unless you have something on the other site that won't terminate G729.
This method doesn't require a transcoder - that's only required if the two ends of the call don't support a common codec.
In more recent versions of IOS 12.3 the DSPs on the motherboard of the 1760s can be set up as a farm and used by callmanager as a transcoder - but you'll probably be using your DSPs for the voice ports and I think you can't share them...
Aaron
Aaron
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