On 12/10/25 21:14, Scott Allen via Talk wrote:

Or is it a fully integrated service that allows active call transfer
from a local cell tower to your wifi setup?
I haven't tried it myself but from what I gather from internet
research is that it will switch between WiFi and cellular as
necessary, even mid-call.

Since it's carried on IP, it gets routed as necessary, taking the best available route, just like any other IP packets. If you want to get into the details, you can look at IP routing factors such as metric that determines the "cost" of a route and picks the lowest. The WiFi would have a lower cost than the cell network. You can see similar with a notebook computer connected to a local LAN via both Ethernet and WiFi, with the route command. Here, Ethernet has a metric of 100 and WiFi 600. This makes Ethernet the cheaper route and will be used. However, if it fails or is disconnected, then WiFi will be used. Similar would happen between WiFi and the cell network, except WiFi is cheaper.