Telephonic communications – Centralized switching system – Call distribution to operator
Patent
1993-10-14
1995-11-21
Hofsass, Jeffery A.
Telephonic communications
Centralized switching system
Call distribution to operator
364132, 364187, 379279, 379309, 395600, 395650, 39520019, 3951821, H04M 300, G05B 1500, G05B 902, G06F 1100
Patent
active
054695031
ABSTRACT:
In an automatic call distribution (ACD) system having a controller function, a primary system controller and a redundant system controller wherein the secondary system controller is in active operation and the primary system controller is out of synchronization with the redundant system controller, a method is provided for resynchronizing the primary system controller to the redundant system controller wherein selected database update functionality of the redundant system controller is suspended and database files and shared memory are copied in phases from the redundant system controller to the primary system controller with the means provided to continue to do data collection, call answering and queuing of calls, except for a brief period immediately preceding resynchronization. A slight delay added by the system in the process of answering incoming calls provides sufficient time for the primary system controller to resynchronize to the redundant system controller with all information and data, at which time the primary system controller assumes real-time operation and the redundant system controller returns to synchronous standby mode.
REFERENCES:
patent: 4466098 (1984-08-01), Southard
patent: 4633039 (1986-12-01), Holden
patent: 4700292 (1987-10-01), Campanini
patent: 5214692 (1993-05-01), Chack et al.
Butensky Michael J.
Collins Kevin T.
Gibbs Richard A.
Grafft Chris A.
Johnson Eric M.
Allen Kenneth R.
Aspect Telecommunications Corporation
Hofsass Jeffery A.
Hong Harry S.
Shaffer William L.
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