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.
Thanks,