Telephonic communications – With usage measurement – Call charge metering or monitoring
Patent
1994-06-22
1996-12-31
Zele, Krista M.
Telephonic communications
With usage measurement
Call charge metering or monitoring
379221, 379199, 379200, 379377, 379386, H04M 150
Patent
active
055901824
ABSTRACT:
A control device may be connected in series or in parallel to a telephone for restricting or routing calls made from the telephone to take advantage of low cost carriers for intra-LATA calls. The serial or parallel connection of the telephone can be detected as well. The device may be programmed for routing depending on the geographical location of the telephone. The central receiving office of the local phone company can be prevented from routing the call by the use of interfering tones.
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patent: 4661975 (1987-04-01), Brecher
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patent: 5200995 (1993-04-01), Gaukel et al.
"The California Phone Rush Is On," by Calvin Sims, The New York Times, Aug. 11, 1993.
Crystal Bonnie
Stevens Jessica L.
Hunter Daniel S.
Telegen Corporation
Weiland William J. P.
Zele Krista M.
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