[FAQ] Using G.729 codec with a Polycom VVX Business Media Phone may be perceived as lower Volume
Utilizing the G.729 Codec on a Polycom VVX Business Media Phone may appear utilizing a lower Audio Volume as for example a Polycom SoundStation or SoundPoint IP Phone.
The Automatic Gain Control / AGC parameter on a VVX phone in parallel with a later Software version (UCS 4.1.8 or UCS 5.2.0 or later) will raise the Volume to a comparable level with the SoundStation or SoundPoint IP Phone.
Notice: This community forum is not an official Poly support resource, thus responses from Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge. If you need immediate and/or official assistance please open a service ticket through your proper support channels. Please also ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's