I played around for a few hours with a polycom 500 phone and it seems me that the dtmf mode is not configurable, looks like it only has inband mode.
While this is ok with G711 I assume that will result in some troubles using G729, altought I cant test it because I havent got any g729 licence yet.
Anyone has tried and is willing to share his impressions ?
I don't (yet) have any Polycom phones, but I have been stuck in situations needing inband DTMF over G.729.
If you press the keys for a relatively long time (100 ms or more) then perhaps 1% of the digits may get lost. IIRC, the '0' key is the worst.
If your application is "for sales, press 1", then it's probably ok.
If you need to key in 4-digit extension numbers, it will be annoying.
If you need to input account numbers, passwords, etc., with complex menus, forget it.
--Stewart
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