Yealink T20P

Enterprise IP Phone Using the Basic Phone Functions
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Codec Selection
The IP phone supports the following voice codecs:
G.722, G.723_53, G.723_63, G.726-16, G.726-24, G.726-32, G.726-40, G.729, PCMU
and PCMA
You can enable/disable the desired codecs via Web interface. Please contact your
System Administrator for more details about the codecs.
To enable/disable the codecs:
1) Choose Account->Codecs.