AUTOMATIC ROUTING TECHNIQUE
 Inventors: Gerald Richard Ash, West Long
Branch; Jiayu Chen, Middletown; Saul
Daniel Fishman, Edison; David
Zerling, Rumson, all ol N.J.
 Assignee: AT&T Corp., New York, N.Y.
 Appl. No.: 08/811,979  Filed: Mar. 5, 1997
 Int. CI.7 H04M 7/00; H04M 3/42
 U.S. CI 379/221; 379/207; 379/219;
 Field of Search 379/221, 219,
379/220, 229, 230, 222, 207
 References Cited
U.S. PATENT DOCUMENTS
5,068,892 11/1991 Livanos 379/221
5,101,451 3/1992 Ash et al 379/221
5,155,763 10/1992 Bigus et al 379/113
5,509,055 4/1996 Ehrlich et al 379/133
5,526,414 6/1996 Bedard et al 379/221
The routing ol calls Irom one network (100) to another network (170) may be accomplished by tracking the call completion history over each trunk group (YIA^YIA^) connecting the networks. From a knowledge ol the call completion history for each route, a Completion Rate Factor (CRF), representing the ratio ol completed calls to all calls attempted is computed. The route having the CRF representing the highest number ol completions is then selected. Typically, the process is dynamic, so that il the selected route no longer has the highest number ol completions, then the route previously found to have the highest number ol call completions is selected. The concept ol completion rate lactor routing can be extended to multiple carriers to yield a carrier completion rate leature routing technique. Routing may also be completed in accordance with network congestion to route advance a call.
13 Claims, 3 Drawing Sheets