Error 30051 when updated to v20

[hhandaka@multiindustry]

Hi,

I just updated 3CX from v18 to v20.

Previously, I had a configuration connecting 3CX (Branch Office 1) with a NEOGATE FXO Gateway TA810 (Branch Office 2).

Calls from Branch Office 1 to Branch Office 2 work without any issues. However, calls from the opposite direction (Branch Office 2 to Branch Office 1) always fail to connect, and I receive a warning with code 30051, as shown in the attached image.

As far as I know, warning 30051 is caused by an untrusted source connection. How can I make this connection trusted?

Previously, this issue did not occur in v18. What should I do? Please advise.

 

[Alphabetic]

30051 will have been happening in v18 its just that 3CX were not displaying these events in the logs.

 

[hhandaka@multiindustry]

30051 will have been happening in v18 its just that 3CX were not displaying these events in the logs.

I see, but in version 18, calls from Branch Office 2 could reach Branch Office 1. However, after the update to version 20, calls from Branch Office 2 can no longer reach the 3CX system at Branch Office 1.