I registered my SIP URI
xxxxxx@sip.simply-connect.de. According to the provider white page this provider seems to work. As part of a test I tried now to access my SIP Broker account via the PSTN access number in Sweden. I do this test from a different country with a long distance call. After the invitation to enter the number I dial *011xxxxx#. Having done now several tests using different phones (softphones and landline), all calls ended with the busy tone. Any ideas why? Could there be a problem with the DTMF when calling from a different country?
Voip-Configuration: ATA connected to an Asterisk on a vServer. I have about a dozen different providers installed and they all work normal.