1
Mark C Baker, William E Hagerman, Jack R Penrod, Nancy S Stevens: Method and apparatus for prioritizing a telephone call according to a level of service of an originator. AT&T, Jack R Penrod, March 19, 1996: US05500889 (44 worldwide citation)

A method and apparatus that allows different likelihoods of call completion during very heavy call loading conditions to be supplied to different customers. Customers are assigned to different levels of service and these levels of service are used to manage call completion in throughout the telecomm ...


2
Nicholas M DeVito, William E Hagerman, Ted Moulos: Routing calls destined for inaccessible destinations. AT&T, Werner Ulrich, April 4, 1995: US05404350 (39 worldwide citation)

An arrangement for selectively routing traffic to alternate destinations. If the network or switch for accessing the primary destination is inaccessible (i.e., out of service), as opposed to simply being busy, calls are routed to an alternate destination; however, if the primary destination is simpl ...


3
Garry R Daly, William E Hagerman, Sankara R Polepalle, Earle H West: Telecommunication disaster plan. AT&T Bell Laboratories, Werner Ulrich, June 22, 1993: US05222128 (23 worldwide citation)

In case of a disaster at one of a plurality of customer's locations, it is desirable to provide for a massive rerouting of telephone calls to that customer. A SafetyNet Service Reconfiguration (SSR) tool enables a network service provider to provide a recovery service for the event where a customer' ...