Unique ringing on a prime telephone

Details Unique ringing on a prime telephone Unique ringing on a prime telephone

1994-03-08

1996-02-13

Hofsass, Jeffery A.

Telephonic communications

Supervisory or control line signaling

Signal reception at substation

379375, 379418, 379252, 379253, H04M 1300

Patent

active

054917468

ABSTRACT:
A telephone switching system is comprised of a main controller, switching circuits controlled by the main controller, a peripheral controller for controlling the seizing of subscriber lines for calls routed through the switching circuits, and further comprising a first memory associated with and accessible by the main controller for storing user data associated with each directory number, the user data comprising a ring type, a second memory associated with the peripheral controller for storing ringing cadence indicators associated with respective plural ring types, the main controller for reading the station data from the first memory upon receiving a request for service to a directory number, and sending the ring type indicator with a subscriber line seize message to the peripheral controller, the peripheral controller for reading the second memory and obtaining the ring cadence indicators associated with the ring type, and ringing a line according to the indicated ring cadence.

REFERENCES:
patent: 4477697 (1984-10-01), Judd et al.
patent: 4615028 (1986-09-01), Lewis et al.
patent: 4962527 (1990-10-01), Burns et al.
patent: 5142569 (1992-08-01), Peters et al.
patent: 5361296 (1994-11-01), Reyes et al.

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