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VVX 600 - downgrades firmware

Occasional Visitor

VVX 600 - downgrades firmware

Each time I use the web interface to upgrade my VVX 600 to firmware I get the prompt that newer firmware is availalbe.  When I check the details it says "Version on Server:" this version is obviously lower than my installed version and I don't have a server.  I only use Skype For Business Online PBX. 


How can I prevent this??

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Polycom Employee & Community Manager

Re: VVX 600 - downgrades firmware

Hello jakes_,

welcome to the Polycom Community.

The community's Skype contains this post here:

Jun 15, 2016 Question:Can I use UC Software 5.5.0 for Lync or Skype for Business deployments?

Resolution:UC Software 5.5.0 has not been qualified by Microsoft to use in Lync or Skype for Business deployments. Polycom will not support UC Software 5.5.0 use in Lync or Skype for Business deployments.


The above is also mentioned in the UC Software 5.5.0 Release notes and you therefore upgraded your phone to an unsupported version.


The S4B Server itself holds the currently supported Version that Microsoft certified and therefore attempts to install this on your 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 Poly 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
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