Private branch exchange apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Sep 21, 1999
Issued Date -
N/A
app pub date -
Apr 1, 1996
filing date -
Nov 20, 1992
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A private branch exchange apparatus which encloses a plurality of external lines and a plurality of extensions including a discriminating circuit to discriminate the number of calls which are being executed and a refusing circuit to refuse a reception call when it is discriminated by the discriminating circuit that the number of calls which are being executed is equal to or larger than a predetermined value such as 1.
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