Telephonic communications – Special services – Call diversion
Patent
1986-12-10
1988-12-06
Brown, Thomas W.
Telephonic communications
Special services
Call diversion
379218, 379267, H04M 322, H04M 354
Patent
active
047900040
ABSTRACT:
The subject implied principal busy status indicator provides all covering users with an indication of the busy/idle status of the principal's line on a covered call. This is accomplished by equipping each covering user's telephone station set with a principal busy status indicator for every line appearance on the covering user's telephone station set. When a covered call is diverted from a principal's line to the covering user's telephone station set, the line appearance on which the covered call appears is lighted and the principal busy status indicator associated with the covering user's line appearance indicates the busy/idle status of the principal's line. The business communication system updates the state of the principal busy status indicator so the covering user knows when the called principal's line is idle.
REFERENCES:
patent: 4256928 (1981-03-01), Lesea et al.
patent: 4436963 (1984-03-01), Cottrell et al.
patent: 4567324 (1986-01-01), Smith et al.
patent: 4634811 (1987-01-01), Curtin et al.
patent: 4701950 (1987-10-01), Curtin et al.
"Diavox Courier 700, Digital System Telephone for MD110", J. Reinius et a Ericsson Review, No. 2, 1982, pp. 58-66.
American Telephone and Telegraph Company, AT&T Information Syste
Brown Thomas W.
Graziano James M.
Moran John C.
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