test,
I don't know what the manual says but I do this. If I need to go say 2000 feet, chicklet 2 1000ft boxes of wire together, terminate to system and other end to an existing station nearby that someone uses a lot. If they have no complaints after a few days, your good to go. I have comdial phones on a dxp working fine more then 3500 feet from the system, I think the book says 1000 or 1500.
mark

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