Why is there a DSL jack on a DSL filter?

I assume a DSL filter filters off the DSL signal. Is that correct?

I just switched to DSL from cable. The kit I got includes three DSL filters. One end of the filter plugs into a phone jack, the other end has two jacks, one labeled DSL, the other phone.

If the purpose of a DSL filter is to filter off the DSL signal, why is there a DSL jack on a DSL filter? (I assume this DSL jack has unfiltered signal. Is that correct?) Why not just plug in to the wall jack?

A separate question. The phone box on the outside of the house has a test jack. What does it do? I plan to plug a DSL filter to the test jack and have all phone lines connected to the phone jack on the DSL filter and have the DSL line which is a separate line connected to the two screws to which the current phone lines are connected. Is that a good idea? Or should I leave the test jack alone and cut the wire of the DSL filter and connect the red and green wires to the screws?

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Posted 5 years ago by John Smith in Digital Subscriber Line

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