Plantronics + Polycom. Now together as Poly Logo

CX300 dead after firmware update fail

Occasional Visitor

CX300 dead after firmware update fail

Hi All,


I have a couple CX300 Desktop Phones that are dead after the firmware update procedure was performed incorrectly. The firmware was being upgraded from to using the PolycomFirmwareDownloaderCX300.exe tool. Now, when connected to a Windows 7 or 8 computer, the driver is not installed correctly and the phones screen remains blank. Is there a method to factory reset the phone or to reboot it to default? Any suggestions welcome.



Message 1 of 3
Occasional Contributor

Re: CX300 dead after firmware update fail

I have same situation with my VVX201, Do any have any clues or solution?
Message 2 of 3
Polycom Employee & Community Manager

Re: CX300 dead after firmware update fail

Hello wenchuan,

welcome back to the Polycom Community.

The original poster had received a special firmware updater which is not required in normal circumstances and is completely irrelevant to a VVX phone so therefore unrelated. They have been helped via our support team and the phone was recovered.


Could you kindly explain what you have done with your VVX as it is in my experience impossible to break a VVX phone.

Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.

Best Regards

Steffen Baier

Polycom Global Services

The title Polycom Employee & Community Manager is a community setting and does not reflect my role. I am just a simple volunteer in the community like everybody else. All posts and words are my own & do not represent the views of Employer.


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
Message 3 of 3