The OBi plugs into any home telephone, giving you free home phone service.
We own the 2-line OBi202 version, and love it.
Call quality is better than mobile/cell phones.
All calls (incoming and outgoing) within the US and Canada are free with Google Voice.
Google voice and voicemail integrates nicely with the home phone, computer, and mobile phone.
Easy to add another line.
Just get a second OBi200 or buy the 2-line version.
Emergency 911 calls do not work with Google Voice.
Obi does offer 911 service through Anveo for $15/year, and is easy to add to the free Google Voice.
We recommend adding this, though it is not required.
A regular home telephone line can still operate during a power outage, however the OBi will not.
If your electricity shuts off or Internet connection dies, the OBi will not work.