Electronic private branch exchanges

Details Electronic private branch exchanges Electronic private branch exchanges

1985-06-28

1987-11-17

Dwyer, James L.

Telephonic communications

Plural exchange network or interconnection

Connection call model

379128, H04M 342, H04M 1534

Patent

active

047078537

ABSTRACT:
An electronic private branch exchange apparatus is constituted by a plurality of office line trunk circuits for connecting a calling terminal in an exchange network to one of a plurality of office lines. An order of connection priority for the office line trunk circuits is set and a range of the office line trunk circuits is set, with a range of the office line trunk circuits selected according to the order of connection priority in accordance with a time band within which a call is made. Ofice line trunk circuits are selected according to the order of connection priority in a designated range.

REFERENCES:
patent: 3231676 (1966-01-01), Carlstrom et al.
patent: 3297829 (1963-10-01), Germanton
patent: 3504129 (1970-03-01), Ewin et al.
patent: 3588369 (1971-06-01), Lee et al.
patent: 4410765 (1983-10-01), Hestad et al.
patent: 4577066 (1986-03-01), Bimonte et al.

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