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Intermittent "unregistered SIP" on Polycom VVX410 on hosted 3CX on Azure

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Intermittent "unregistered SIP" on Polycom VVX410 on hosted 3CX on Azure



Hoping you can help me.


I have a Polycom vx410 connect directly to a hosted 3CX PBX over the internet, I have factory reset the device and upgraded to the latest firmware, and provisioned the device no problems... the issues are then when trying to use the phone, The phone line will go "unregistered" and then reconnect intermittently, and when it is logged in you cannot use the phone at all.


A call will come in and picking up the handset does not do anything.


UC Software Version5.9.6.2327


3cx version -


All firewall ports are configured as per guide on 3cx website.




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Polycom Employee & Community Manager

Re: Intermittent "unregistered SIP" on Polycom VVX410 on hosted 3CX on Azure

Hello @elleakio ,


Welcome to the Poly Community.

From our FAQ:


Jan 19, 2012 Question: How to troubleshoot Polycom VoIP related Issues?

Resolution: Please check => here <=


Most likely some keep-alive issue or similar but as we do not have any backup of the device and/or any logs we cannot comment.


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

Best Regards

Steffen Baier

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
Message 2 of 2