i have a problem creating a inbound route for unitymedia sip-accounts on a yeastar s20 pbx.
The registration on a SIP-Server works with all my numbers, where you have to specify your sip-data according to the scheme username: n123456789_1, your password and the sip server.
Normally you create a inbound route by specify a did pattern according to the number(for example 0049021116729341 belongs to the username n123456789_1) that you want to reach form outside to your extension.
But in this case it doesn't work.
I made a wireshark scan where i made a discovery that surprised me. The SIP-Invite includes the username instead of the phone number you are dialing from outside.
I have no idea how to link the username to the number in a inbound route, because the username contains a underscore that is not allowed to use in the inbound routes.
Maybe someone has a idea or solution for this kind of sip-account.
I would appreciate.