HD Calling?

[ElementalWindX]

I've noticed I've gotten my yealink phones to do HD calling, however only one of the two phones in a call will display HD in the top right. All using Yealink T46S phones. Is there something I'm doing wrong to get it to say HD on both? How can I achieve this if possible?

 

[leejor]

If the sets are connected directly (not set to use PBX Delivers Audio), and no transcoding is happening (check the 3CX Activity Log), and one set shows HD, then i would assume that other is as well. Perhaps a firmware glitch? Is it the initiating, or terminating set that shows HD, is this consistant, same firmware? You could closely examine the Activity log (or Wireshark) to see which Codec was agreed upon, when establishing the call(s).

 

[ElementalWindX]

The pbx is set to deliver audio as it's over STUN.

 

[leejor]

Then there may be transcoding happening...check the logs.