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IP335 DHCP issue

Occasional Visitor

IP335 DHCP issue

Hello all,


We have a remote site that uses IP335 phones running  They connect back to us over a MPLS circuit where our Interactive Intelligence phone switch is.  The issue we are having is the phones get an IP address in their correct VLAN from the local DHCP server at the remote site but they will not register with the phone system here.  I can ping the phones from the main site so basic routing seems to be working.  The firewalls, in order to troubleshoot, have been set up to allow all traffic between the two sites.  The weird thing is if we add a DHCP reservation using a completely different IP address then they register back with our phone system and work just fine.  Anyone seen something like this or need additional information?

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Polycom Employee & Community Manager

Re: IP335 DHCP issue

Hello knightmese,

welcome to the Polycom Community.


UC Software 4.0.1 has not been supported for multiple years. so you should be using a current software like UC Software 4.0.9

In addition the community's VoIP FAQ contains this post here:


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

Resolution: Please check => here <=





Aug 24, 2015 Question:What basic network data is send and received by a Polycom phone?

Resolution: Please check this post => here <=

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
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