Issues with Polycom VVX 400

Occasional Visitor

Issues with Polycom VVX 400



I'm new to the forums and I have a quick question. We provide VoIP services to our clients through Coredial, I have already contacted them about this issue but they believe it is the phone itself. At one of our client sites, they are demoing the VVX 300, 400, and 500. The 300 and 500 aer working perfectly fine, but the 400 is acting up. In only one of the offices will it connect to the network and work. In all other offices the phone will not connect to the network, and it will not have an IP on it. Is there a solution to this issue?

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Polycom Employee & Community Manager

Re: Issues with Polycom VVX 400

Hello Zsussman,

welcome to the Polycom Community.

It is always useful to include the currently used SIP or UC Software version as issues experienced may already be addressed in a newer release.

Please also include if you are using a SIP server or a LYNC server

This also allows yourself and others to check against current software release notes.

The above is also stated in the "Read First: Welcome to the Polycom VoIP Forum"

Therefore the Polycom VoIP FAQ contains this post here:

Question: How can I find out my SIP UC Software Version or the BootROM Version of my Phone?
Resolution: Please check here

Are you using any VLAN's, LLDP or CDP to assign IP / Network details and have you yet tried to take a wireshark trace via a spanned port / hub in order to verify if the phone request's an IP and if the server responds?


All VVX phones are using the same software.


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


If official support is required please check how to phone or open a case here

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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