Telephonic communications – With usage measurement – Call charge metering or monitoring
Patent
1996-05-07
1998-11-24
Loomis, Paul
Telephonic communications
With usage measurement
Call charge metering or monitoring
379 45, 379 48, 379113, 379209, H04M 1500, H04M 1104
Patent
active
058418482
ABSTRACT:
Disclosed is a system and method which screens all telephone call originations on an access system for calls to emergency services during times of telephone system congestion and bases a decision as to how to handle the call on such determination. According to this invention, all access system call originations (including dialed digits) are delivered to the switching system. If the access facilities are in an overload condition due to high volume or equipment failure, the switching system makes a predetermination as to whether the digits dialed indicate a call for emergency services (a 911 call) or a regular telephone call. Calls for emergency services are immediately routed. Regular telephone calls are advantageously routed to an announcement which announces traffic congestion and disconnects the call, thus providing access facilities for additional emergency calls. Advantageously, the switch stores the calling and called number for the purpose of completing the call after the congestion condition has cleared.
REFERENCES:
patent: 4839892 (1989-06-01), Sasaki
patent: 5295183 (1994-03-01), Langlois et al.
patent: 5425091 (1995-06-01), Josephs
patent: 5596625 (1997-01-01), Leblanc
patent: 5692033 (1997-11-01), Farris
Johannesen Michael B.
Loomis Paul
Lucent Technologies - Inc.
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