Method and apparatus for providing answer supervision and an autonomous pay telephone incorporating the same
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United States of America Patent
Stats
-
Nov 1, 1994
Issued Date -
N/A
app pub date -
Jul 28, 1992
filing date -
Apr 18, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for telephone call answer supervision, capable of detecting the completion of both national and international calls, which employ different answer confirmation formats, and provide confirmation that a placed call has been answered if least one of the following conditions occurs: 1) a tone of a given frequency, transmitted on the transmit line of a telephone, is detected as received back on the receive line; and 2) audio activity having a non-repetitive cadence is detected on both the transmit and receive lines of the telephone. Also provided is an autonomous pay telephone, such as a mobile telephone, which includes an arrangement for determining and accessing a call rate, per unit of time, for a call placed to a given telephone number, a display for displaying, in real-time as the call progresses, charges for a completed call as well as an accounting arrangement for storing charges accessed for each completed call.
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