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US 4,395,596 AGranted
Multi-line controller
OwnerHarold N. Leitman, Walter J. Langeinventors
Life of this patent
Estimating the term…
Abstract
A multi-line controller device which provides lamp control and ringing control for single line telephone accessory equipment when connected to a multi-line telephone system. Control is selectively provided for any incoming line of the multi-line system through a combination of a multi-position switch and an opto-coupler device.
Claims3
A multi-line controller for connecting single line telephone accessory equipment to a multi-line telephone system, comprising,
- means for selectively connecting said single line telephone accessory equipment to a particular incoming line of sid multi-line telephone system, and
- means operative when said single line telephone accessory equipment is connected to said particular line, and responsive to said single line equipment going off hook, for providing an A and A1 closure signal to the multi-line telephone system.
Dependencies are inferred from the claim text.