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US 5,627,833 AGranted
Digital added main line system with power-up and power-down features
AssigneeRaychem Corporation
InventorDavid C. Bliven
Life of this patent
Estimating the term…
Abstract
A method for powering a system for transmitting and receiving multiple telephone transmission signals over a single twisted pair. The method also powers down a portion of the system. An analog signal from a local switching station is converted to an 80 kbits/sec signal for transmission over a twisted pair. A remote terminal converts the 80 kbits/sec signal back into a conventional analog signal for use in conventional telephone, facsimile or other related equipment.
Claims15
A method for powering a system providing multiple telephone line service over a single twisted pair, said method comprising:
- installing the system, the system including master equipment at a first location coupled through said single twisted pair to a remote terminal at a second location, the system using signals from the group consisting of 2B1Q and 4B3T to provide multiple telephone line service over the single twisted pair;
- receiving power from telephone company equipment at the first location;
- using the power for master equipment operation;
- transmitting the power across said single twisted pair to the second location;
- using the power for remote equipment operation;
- and
- powering down a portion of the remote terminal when:
- the system is not in a ring stop mode,
- and a ring request is made,
- and a line is off-hook;
- or
- the system is not in a ring stop mode,
- and a ring request is not made,
- and the line is not in a ring active mode, and the line is not off-hook.
11 more elements
Dependencies are inferred from the claim text.