Telephone exchange system, dial-in incoming call method thereof, and dial-in incoming call program thereof
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United States of America Patent
Stats
-
May 20, 2014
Grant Date -
Nov 29, 2012
app pub date -
Jan 19, 2011
filing date -
Jan 22, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A telephone exchange system includes a connection interface connecting a communication line and a plurality of extension telephones, a database having a dial-in conversion table registering a received number in association with a number after conversion for a dial-in incoming call, and an extension number table registering an extension telephone in association with an extension number of the extension telephone, and a main controller connected to the connection interface and the database. When the dial-in incoming call comes from the communication line, the main controller retrieves an extension number which coincides with the received number from the extension number table. When there is an extension number which coincides with the received number, the main controller causes an extension telephone corresponding to the extension number to ring.
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