Private branch exchange and telephone switching system

Details Private branch exchange and telephone switching system Private branch exchange and telephone switching system

2006-03-14

2010-06-01

Tieu, Binh K (Department: 2614)

Telephonic communications

Multi-line or key substation system with selective switching...

Line status indication or call alerting

C379S142170, C379S156000, C379S198000

Reexamination Certificate

active

07729486

ABSTRACT:
According to one embodiment, a private branch exchange includes a receiver which receives caller ID information divided into a plurality of packets, the caller ID information specifying a caller side telephone set, when receiving an incoming call, a measurement unit which measures an elapsed time after the receiver has received the packets, a reset unit which resets the elapsed time measured by the measurement unit when the receiver receives the packets, and a transmitter which transmits the packets received by the receiver to a private telephone set on an incoming call side, as caller ID information, when the elapsed time measured by the measurement unit exceeds a specified time.

REFERENCES:
patent: 6169738 (2001-01-01), Sriram et al.
patent: 6952468 (2005-10-01), Lee
patent: 7248679 (2007-07-01), Choi
patent: 2001/0028708 (2001-10-01), Tanaka et al.
patent: 10-174134 (1998-06-01), None
patent: 11-068923 (1999-03-01), None
patent: 11-187434 (1999-07-01), None

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