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Soundpoint IP 335 4.0.6 continuosly restarting

Occasional Contributor

Soundpoint IP 335 4.0.6 continuosly restarting

Sorry for the long post but this has been driving me bonkers fro quite some time.  I have 2 IP 335 phones that appear to lock up after getting an IP address.  When I power on the phone it gets to Initializing network then just hangs.  I can see the phone registered in the DHCP server and te IP address assigned to it.  I am unable to access the menu on the phone to verify the phone has that IP address.

Here's where it gets strange.  If i take the phones and connect them outside my internal network either directly to my cable modem or on another zone in my firewall they will boot normally and I can make calls.  I do have other Polycom phones on my internal network and they work just fine.  They are different models though.  VVX410.

My configuration

Provider is 8x8.  I tried working with their support and didn't really get anywhere

Firewall is a Sonicwall TZ 400

Switches are HP with 2 VLANs.  VLAN 1 is default for data, VLAN2 is configured for voice.

I have been through the configuration of the firewall and the switches several times and cannot find anything that may be causing the issue.  Like I said, I do have phones that work.  Here is a review of what I have tried.

Connect an IP 335 to the internal network.  They phone will get an IP address but will not register.

Connect an IP 335 directly to the cable modem.  The phone register with 8x8 and I can make calls.

Connect an IP 335 to a different zone on the firewall.  The phone will register with 8x8 and I can make calls.

Any sugestions are appreciateed.


Message 1 of 3
Polycom Employee & Community Manager

Re: Soundpoint IP 335 4.0.6 continuosly restarting

Hello reddog,

welcome to the Polycom Community.

Firstly you are using an unsupported version of software.


You should be running UC Software 4.0.11 and BootROM / Updater 5.0.11

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 2 of 3
Occasional Contributor

Re: Soundpoint IP 335 4.0.6 continuosly restarting

Unfortunately, the software upgrade to did not help.  I have a workaround in place so the phones are useable.

Thanks for the suggestion.

Message 3 of 3