Patent EP0715475A2 successfully refreshed from Google Patents.
EP0715475A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Call processing method in a PCS environment
Assignee: AT&T Inc
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Filing: 1995-11-21
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Granted: —
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Expires: 2015-11-21
Abstract
Abstract 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.
Inventors
- 👤 Allen Eisdorfer
- 👤 Jerry Eisdorfer
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 17:55
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/42; H04M3/4228; H04M3/46; H04Q; H04Q3/00; H04Q3/64; H04Q3/66; H04M3/42229
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
102 words
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 CHARACTERIZED BY: determining if the current destination of said sequence is a disconnected telephone; and skipping over the current destination, so that no attempt is made to complete a PCS call to the disconnected telephone.
Claim 2
Dependent Claim
17 words
The invention as defined in claim 1 CHARACTERIZED IN THAT said destinations are indicated by telephone numbers.
Claim 3
Dependent Claim
22 words
The invention as defined in claim 1 CHARACTERIZED IN THAT said disconnected telephone is a wireless telephone that has been turned off.
Claim 4
Dependent Claim
24 words
The invention as defined in claim 1 CHARACTERIZED IN THAT said disconnected telephone is a telephone that has been disconnected from a cable network.
Claim 5
Dependent Claim
31 words
The invention as defined in claim 1 CHARACTERIZED IN THAT said steps are performed in a telephone network within said telephone system that is not directly connectable to said disconnected telephone.
Claim 6
Dependent Claim
22 words
The invention as defined in claim 1 CHARACTERIZED IN THAT said steps are performed in an interexchange carrier within said telephone system.
Claim 7
Dependent Claim
79 words
The invention as defined in claim 1 CHARACTERIZED IN THAT at least one of said plurality of destinations is presently served by at least one other telephone system to which said telephone system is connected, and wherein said method includes the step of receiving a signal from said at least one other telephone system indicating whether or not said at least one of said plurality of destinations served by at least one other telephone system is a disconnected telephone.
Claim 8
Dependent Claim
48 words
The invention as defined in claim 7 further CHARACTERIZED BY the step of storing an indication that said at least one of said plurality of destinations served by at least one other telephone system is a disconnected telephone, said storing being performed in response to said received signal.
Claim 9
Dependent Claim
64 words
The invention as defined in claim 7 further CHARACTERIZED BY the step of transmitting from said telephone system to said other telephone system a request for information indicating whether or not said at least one of said plurality of destinations served by at least one other telephone system is a disconnected telephone and wherein said signal is received in response to said transmitted request.
Claim 10
Dependent Claim
14 words
The invention as defined in 9 CHARACTERIZED IN THAT said requests are transmitted periodically.
Claim 11
Dependent Claim
50 words
The invention as defined in 9 further CHARACTERIZED BY 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 other system, said home telephone system being connected to said telephone system.
Claim 12
Dependent Claim
19 words
The invention as defined in claim 11 CHARACTERIZED IN THAT said home telephone system is said other telephone system.
Claim 13
Dependent Claim
96 words
Apparatus for processing a telephone call for which there is stored a sequence of telephone numbers for use in routing said call comprising: means for retrieving at least one telephone number of said sequence; said apparatus being CHARACTERIZED BY means for determining if the current destination of said sequence is a disconnected telephone; and means responsive to said determining means for routing said call to each telephone number of said sequence that is determined to not be the telephone number of a disconnected telephone, said routing in sequence continuing until said call is completed or abandoned.
References Cited (Backward Citations)
US5392342A
Cited
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