VP2009P elite Problem with audio Codec

[racom]

I have a Vp2009P elite operating with IP PBX Grandstream 5028. This Video Phone no audio traffic when access to FXO integrate in PBX (only VP2009P have its problem, the other model of diferent manufacture no have its problem); when the vp2009p access to SIP IP TRUNK o sip extension no have the problem. The firmware version the VP2009P elite is 23.40.0.20.
How to resolve this issue of the video phone vp2009p?..... thank you..!

[Yealink Support]

Hi Racom,
Sorry maybe our VP2009P can't compatible with FXO releated integration.

[donn]

About VP2009T, you mean if you make voice call, there's no problem, but if make a video call, both of them will reset? Reset or reboot? Did you connect the correct power adapter?