Just like I replied already to your older post => here <=
It is always useful to provide some kind of background information on the device.
Is this a brand new unit or a used unit?
If used how long have you had it?
PoE powered via a Switch or external Power Supply?
Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.
Polycom Global Services
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