Method and apparatus for call source identification
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 3, 1991
Issued Date -
N/A
app pub date -
Jan 11, 1991
filing date -
Sep 25, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Calls made to a communication unit from the telephone network include a code which can be appended as a predetermined prefix or suffix to the units address code, for alerting the operator that the call was made from the telephone network. Conversely, calls made to the communication unit from another communication unit do not include the code thereby alerting the operator that the call was made from a communication unit. The alert can be accomplished by using visual indicators or and alphanumeric display and/or can be accomplished by use of two distinct audible signal.
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