Interface system isolating a subscriber subset from a...

Details Interface system isolating a subscriber subset from a... Interface system isolating a subscriber subset from a...

H - Electricity

04

M

379/63

H04M 19/00 (2006.01)

Patent

CA 1145497

TITLE INTERFACE SYS? ? ABSTRACT OF THE DISCLOSURE An interface system for installation in a centralized location remote from the customer's premises. A single line is employed in normal opera- tion between the customer's telephone equipment and certain special use equipment such as a centrally located answering and recording equipment. The equip- ment may be located in a telephone central office or alternately in a separate location remote to both the customer's equipment and the telephone central office. When the equipment is in operation, the customer's phone is isolated from the telephone central office. If the customer goes "off-hook" the equipment is dropped and the customer's line is automatically connected to the incoming call.

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