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disconnect the 2 plugs... and cross the wires marked.
this will pass the same signal between line 1 and 2.
connect the vonage box to any jack.. or outside to the crossed wires.
Okay, another question. That dangling wire in the basement from the upstairs jack - I connected the red and green wires to a jack I installed in the basement by the adapter. I disconnected the house from the phone company and connected the adapter to the new jack in the basement. I get dial tone, but upon picking up there are 4 quick dial tone pulses....