Some Phones lose registration over night

[DANKREEFER]

We just went live a couple of weeks ago with a new Cloud Based 3cx system fro our company. We have about 150 desk phones on the system, and we seem to have several issues with certain phones at different locations. The issue we have is that certain phones lose registration overnight, and its only certain phones at these locations. Hardware we are using are Netgear switches models GS752TPv2 ,GS728TP. They are setup with Auto-Voip and using the OUI table to provide phone VLAN to them, and all that seems to work fine. We are using Sonicwall's at all these locations from TZ-100 series, to TZ-300 series.

Our Cloud provider tells us that its probably a switch issue since they brought out one of there switches and isolated 1 phone that is having the issues on to a Ubiquiti switch and the phone seems to not have lost its registration.

The question I have for them, which they could answer was why is it only happening to 1-2 phones at certain locations, and not all phones. No Answer.

What they have tried is to reload the current firmware to these phones, and also re-provision these phones as well.

Phones in question are Yealinks models T42s, T52s, and 1 T58v

Any help would be appreciated.

 

[cobaltit]

And the phones are provisioned how? Is your cloud provider just providing the cloud space or are they providing the entire setup?

 

[DANKREEFER]

Cloud provider is providing the entire setup at their COLO.

 

[cobaltit]

Ok well it sounds like they are setup as STUN. I'd ask the provider about setting up a SBC at each location.

 

[DANKREEFER]

As for the provisioning...

They are provisioning the phones at their shop before bringing them onsite.

 

[DANKREEFER]

Ok well it sounds like they are setup as STUN. I'd ask the provider about setting up a SBC at each location.

I think they are providing a SBC at the sites right now. Our firewall is handing out DHCP to the phones, and the GW is their managed device handling QOS.

 

[cobaltit]

By provisioning I meant how they were connecting to the hosted 3CX instance. They would be configured as Local LAN (via VPN on your Sonicwall), STUN (direct over the internet) or SBC. The 3CX SBC would require a local device at each network. They could have a hosted SBC on their end as well.

 

[cobaltit]

Hmm...Is it the same 1-2 phones or is it random phones?

 

[DANKREEFER]

Hmm...Is it the same 1-2 phones or is it random phones?

Its the same phones at 4 different locations. And only those same phones. Total 4 phones out of 150