Hello, is there a workaround to register the mikopbx at tel.t-online.de ?
based on this information it does not work
https://www.telekom.de/hilfe/werksreset-speedport/werksreset-faq/einrichtung-sip-client?samChecked=true
phonenumber@t-online.de there seem to be problems for the busername
1and1 it went without problems
Thanks in advance
MfG Marcel