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Constant Clicking?

I am wiring a C-2000, C-2000A or C-2000B into a trunk port/FXO Port on my phone system and I get a constant clicking from the controller when I access that trunk port/FXO port.  What does this mean?

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This usually means the controller needs to be programmed into the “*5” mode (“dial 9 to access the outside line”).  The description of this mode is found in the C-2000B product manual on page 12 under “Q. Outside Line Access”

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