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US 5,706,339 AGranted
Technique for use in processing personal telephone calls
AssigneeAT&T Corp.
InventorsAllen Eisdorfer, Jerry Eisdorfer
Life of this patent
Estimating the term…
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AssigneeAT&T Corp.
InventorsAllen Eisdorfer, Jerry Eisdorfer
Estimating the term…
In a personal communication service (PCS) environment, where a call to a personal telephone number may be routed to a sequence of telephone numbers until the call is answered or abandoned, and where it is possible that the destination telephones indicated in the sequence may be disconnected telephones such that they are unreachable from any network, a method for avoiding wasteful attempts to route the call by a) determining if any telephone numbers of the sequence correspond to disconnected telephones, and, if so, b) skipping over such telephone numbers, i.e., those of disconnected telephones, so that no attempt is made to complete a PCS call to a disconnected telephone.
A method for use in a telephone system having a plurality of destinations to which a personal communication system (PCS) call may be routed, said telephone system attempting to complete a PCS call placed from a calling telephone to a subscriber's personal telephone number by routing said call, until said call is answered or abandoned, to each destination indicated in a predetermined sequence of destinations, the method comprising the steps of:
The invention as defined in 9 wherein said requests are transmitted periodically.
The invention as defined in 9 further including the step of transmitting a query from said telephone system to a home telephone system for said at least one of said plurality of destinations requesting information identifying said at least one other telephone system, said home telephone system being connected to said telephone system.
A method comprising the steps of:
Dependencies are inferred from the claim text.