Unable to call after upgrade to v20 (error 30051)

[ElianKraja]

Dear all,

We've performed the upgrade to v20 from v18, by reinstalling the software and uploading a v18 backup.
Since then, we're not able to perform any call from the internal phones.
We get a 30051 error code (attached the error that can be seen in the admin console).
On the other hand, we can receive external calls, and internal calls via 3CX App.

We have an on-premisses instance of 3CX, which is perfectly working on v18.

Any help would be very much appreciated

 

[xcobean]

Do you mind sharing a screenshot of how you have configured one of the phones?

 

[ElianKraja]

Hi xcobean,

You mean the configuration of the in the "IP Phone" tab, in user page, don't you?
Attached a couple of screenshots of those configurations.

 

[xcobean]

Hi, on the phones I mean.

 

[ElianKraja]

Oh, okay.

Attached the General Tab for account 1 (where the 2541 number is configured) and the "Upgrade and provisioning page" (we do provisioning via http)

3cx.domain.name is the 3CX installation VM IP, on the subnet dedicated to the phones.

 

[xcobean]

add 3cx/sbc ip under outbound proxy and test again.

 

[ElianKraja]

Hi xcobean.
I'll have to schedule this during a maintenance window.

Thank you for going through this.

 

[xcobean]

happy to help