Switchboard terminal apparatus having a plurality of loop circui

Details Switchboard terminal apparatus having a plurality of loop circui Switchboard terminal apparatus having a plurality of loop circui

1992-08-15

1994-11-22

Dwyer, James L.

Telephonic communications

Centralized switching system

Switching apparatus for connecting calling line to...

379 94, 379266, H04M 342

Patent

active

053675681

ABSTRACT:
In a switchboard terminal apparatus, a plurality of loop circuits are simultaneously handled by a switchboard operator. The number of loop circuits in the apparatus exceeds the capacities of screen displays and keys/lamps. A normal loop circuit controller controls loop circuits up to the capacities as normal loop circuits. A virtual loop circuit controller controls loop circuits exceeding the capacities as virtual loop circuits. A first switching circuit for switching control of the loop circuit, which processes a given call, from the normal loop circuit controller to the virtual loop circuit controller in accordance with a call release request operation of the given call by the switchboard operator. A second switching circuit switches a call being controlled by the virtual loop circuit controller to a call under the normal loop circuit controller when a reentering operation of the switchboard operator occurs by regarding the call as a virtual incoming call to the normal loop circuit. A virtual queue controller controls the call in a virtual incoming call queue state during switching by the second switching circuit.

REFERENCES:
patent: 3294922 (1966-12-01), Schneider et al.
patent: 3297828 (1967-01-01), Baumfalk et al.
patent: 3702380 (1972-11-01), Gueldenpfenning
patent: 4599493 (1986-07-01), Cave
patent: 4656623 (1987-04-01), Dalby
patent: 4656624 (1987-04-01), Collins
patent: 4951310 (1990-08-01), Honda
patent: 4953204 (1990-08-01), Cuschleg
"KDX-O Service Position-Computer-Aided Telephone Operation System," Nakagome et al., IEEE 1972 International Switching Symposium, 6-9 Jun. 1972, pp. 104-112.

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