Cisco phones will not register

[[email protected]]

I have a client who has a 3CX system that is hosted. All his extensions are remote.

He has 3 different locations he uses the phones. There is at least 1 phone registered in each location, but his main office has 2 phones that will not register.

If you do a factory reset they will receive the provisioning file, but then when they go to register they fail.

One is a SPA504G2 one is a SPA525G2

They have been working since upgrading to V15, and just stopped working over the thanksgiving break.

Trying to see if anyone has any suggestions to help troubleshoot this.

Thanks

 

[leejor]

Since they just seems to have stopped on their own, something must have changed.
Check the 3CX Activity log, does it show any sign of a registration attempt? Any error messages?
Is it just one location having the issue, or all?
Since you are able to remotely provision, there is obviously connectivity. Could it be a DNS issue?
Run the 3CX firewall checker, any errors?.

 

[Dave-TTG]

You've said the server is hosted, so what provisioning method are you using? SPA's don't work in SBC or STUN since v15, so there would have to be a site to site VPN in place for the phones to work in "Local LAN" mode