I have a machine which runs smoothly as it should.
But everytime I try to call out, I get a SIP 603 declined and then everyone is congested/busy at this time.
Let me explain to you the situation.
The pbx was setup at this current location with a certain IP.
There had been made a trunk to an online provider to be able to make external calls.
Everything worked without a problem but then the pbx got moved to a different location and received a new private and public IP.
Since then it gave me the sip 603 declined message.
I’ve contacted the provider and they told me that it’s a problem on how the authentication is being offered.
Which is weird because it worked before without any problems. (The change in location was also a change of country)
I had received a useraccount and password to have the trunk register to the provider which worked ok, after moving the pbx, it still registers but still giving me a declined message and their support is 0 on this matter.
When I was talking to techsupport, they allowed authentication on the public IP instead of using the user/password.
Making the calls worked like a charm but then they closed the IP authentication again due to security reasons (which I understand).
Now my question is, what could be causing this or how can I fix this?
Especially since the only thing changed was the country and public/private IP.