The MJ doesn't work even if it is plugged into just the computer.
I got the MJ plus so I wouldn't have to leave my computer on all the time.
The DSL modem is from Century Link and is a 660 series.
I plugged my computer directly into the dsl modem and restarted the computer. I had internet access.
I then plugged the MJ directly to the dsl and tried to call in on my cell phone. it still did not work.