how do I add a phone to an existing system, we have several phones and can plug another phone into an existing outlet, but none of the lines lite up when ringing, you can't tell who is on a line and you can not answer the phone when it rings. All you can do is make outgoing calls and pick up a paged or parked call.

Asked by Vicki on 08/12/2014 1  Answer

ManualsOnline posted an answer 9 years, 8 months ago

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