Forum Discussion
MS Teams roaming
Admins can setup Emergency locations so that correct location information is sent to your PSAP, this can use IP subnets and switch ports to see the location of the user. But this is not used for call routing of regular calls.
Plan and manage emergency calling - Microsoft Teams | Microsoft Docs
Location Based Routing is also checking the location of the Teams client, but that is used to make sure that the user dials out from the site that they are located. So if you have setup Direct Routing with Location Based Routing that could be why you hear different ringtones.
Plan Location-Based Routing for Direct Routing - Microsoft Teams | Microsoft Docs
If LBR is not implemented the Voice Routes you have setup decides where to send the call and that is based on the number you dial.