For
voip.ms the answer is simple. Setup two "extensions" on
voip.ms, register one extension on the OBi202, the other extension on the ip phone. If you have a DID with
voip.ms you set it up for incoming calls to go to one extension or the other or to a ring group that you setup on your
voip.ms account to ring both. The voip provider is pretty flexible.
Someone else will need to help with the answers for
freephoneline.ca because I am not familiar with it or the ip phone beyond the basics. Answers you need to know
(1) is there a way to setup multiple registrations with your
freephoneline.ca account? the answer is usually no.
(2) can you make outgoing calls with
freephoneline.ca without registration, i.e. outgoing only calls? Can you setup the ip phone to make outgoing calls without registration if you wanted to?
(3) do you have an incoming number from
freephoneline.ca, a DID? Do you wish it to ring on both the OBi202 and the ip phone? If ringing on one adapter is OK, which one?
(4) does the ip phone accept incoming direct ip calls? Can the ip phone make outgoing direct ip calls? Will your
freephoneline.ca account accept incoming sip uri calls? Can you make outgoing sip uri calls from the ip phone?
(5) what are the requirements for voicemail for unanswered incoming calls?