Internet protocol compliant private branch electronic exchange and a method expanding the number of controlled terminal ports
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United States of America Patent
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Aug 25, 2009
Grant Date -
Oct 30, 2003
app pub date -
Apr 9, 2003
filing date -
Apr 25, 2002
priority date (Note) -
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Abstract
in a sufficient number for serving the number of circuits accommodated by the IP-PBX. On each of the protocol handlers, a microprocessor performs processing tasks corresponding to a load shared on it in interfacing with a given number of terminals, using a call control data slave table in its memory, call control protocol conversion function, fault-supervisory-processing function, call control protocol retransmission function, call control protocol transfer function, and terminal supervisory function.
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