To connect your modem and a telephone to the same
wall jack, go to step 5. (To connect both your modem
and a telephone, you need a dual-RJ11 connector.)
Telephone
Jack
Plug the other end of the phone cable into the single jack
5.
on a dual-RJ11 connector.
Unplug the telephone cable from the wall. Plug the
6.
cable into one of the remaining jacks on the dual-RJ11
connector.
Telephone line connection
Adding Options 3-5