On DSL like "burnsk" above. DH's desktop is connected to it but my laptop connects wireless and my daughter comes over with her laptop and connects as well. The three computers can use it at the same time with no interference. I did have the cellphone hookup when I was traveling frequently. Loved it but found it expensive as their cheap rate only gives you limited time before socking it to you and their unlimited program, on top of the cellphone cost, was very expensive. When I retired I dropped it for the DSL above.