Telecommunications – Radiotelephone system – Special service
Reexamination Certificate
2005-08-30
2005-08-30
Vo, Nguyen T. (Department: 2685)
Telecommunications
Radiotelephone system
Special service
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.
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Janssen Holger
Kropp Steve
Stein Julie E.
Vo Nguyen T.
VTech Telecommunications Limited
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