I followed the instructions here, World's Most Private Voice Assistant - Home Assistant, and managed to get a phone connected to my Home Assistant instance. Yay!
However… I actually spent the extra $10 and got the Grandstream HT802, which supports two lines. The idea was that I could use two phones (or a phone supporting two lines) to access different voice assistants.
The good news is that this adapter works with one line. HOWEVER, the instructions only provide a single port on Home Assistant so there is no way to connect different lines to different voice assistants… that I can see.
I also want to connect various other things over VoIP, for different purposes (e.g. door answering service, phone answering service) and these need to be configured differently, so I need multiple “ports” or “extensions” for different lines for that, too.
I should mention that I’m setting up an instance of FreePBX on a different computer so may be able to work around these using a PBX to route calls, but I still would rather Home Assistant support multiple ports so I can, for example, give different authorities to different access points.