Apparatus for conducting a conference call between a...

Telecommunications – Radiotelephone system – Special service

Reexamination Certificate

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Details

C455S462000, C455S550100, C455S554200, C455S556100

Reexamination Certificate

active

06937854

ABSTRACT:
An apparatus and method for conducting a conference call between a wireless line and a land line using customer premise equipment, where a cordless telephone device connected to the PSTN includes a wireless telephone cradle for receiving a cellular telephone. Interface circuitry residing in the cordless telephone controls operation of the cordless telephone handset and the cellular handset when positioned in the cradle and connects a first call between a user and a first party via the PSTN and a second call between the user and a second party via the wireless telephone network toward establishing a conference call among the user, the first party and the second party. Echo cancellation and suppression is provided to minimize objectionable echo between the two far end parties.

REFERENCES:
patent: 5450471 (1995-09-01), Hanawa et al.
patent: 5526403 (1996-06-01), Tam
patent: 5715296 (1998-02-01), Schornack et al.
patent: 6314303 (2001-11-01), Phipps
patent: 6366784 (2002-04-01), Hsueh
patent: 2002/0072390 (2002-06-01), Uchiyama
patent: 2002/0102974 (2002-08-01), Raith
patent: 2004/0072544 (2004-04-01), Alexis
patent: 2004/0132485 (2004-07-01), Charney et al.

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