Wireless adapter connection for 3 phones

I have ordered OOMA Telo with the wireless adapter. I’ve been reading on the forums that to make all phones work inside the house phone wiring must be disconnected at the outside box. Is this still the case if I will be using the wireless adapter or will all my phones ring since OOMA is utilizing internet service, or am I missing something?

If u have a phone system with multiple cordless handsets u just need to plug the base into the Telo.

If you have phones connected to wall jacks, you will need to disconnect the incoming phone line from your telco. This needs to be done in the NID box. You then will need to run a line from the Telo to a wall jack and you will feed dial tone to other jacks throughout the house.