This hub works with your high-speed Internet and your home phones to deliver VoIP phone services and supports up to 4 Ooma Telo handsets. With easy setup, you can enjoy unlimited U.S. calling and low international rates.*
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I have no tech savvy, but just plugged it in and it works great. I have cable company internet, a slower service may not work as well. Faxes work great, also. Only complaint is cost. Purchase price is too high, and the basic free service does not include caller-id and some other things. If you want that it's $9.99/month.