Yealink phone low volume

[1337]

We have Yealink T41S (same as T42S) phones but the mic volume is too low.

From searching the net I found that these are the setting in the provisioning file that needs to be changed.

voice.handfree_send = ???
voice.handset_send = ???
voice.headset_send = ??? 

Could anyone share what you have these set to?
Have you experienced the same issue?

We are running 3CX and not FreePBX but I don't think it is PBX related. The setting from FreePBX would give me a good starting point.

[JaredBusch]

Well, one client I have this. This client does not use EPM. I created these files.

No idea why right now.

[JaredBusch]

This client uses the commercial EPM to manage the phones and this is what it created.