Group communications switching method, subscriber terminal...

Details Group communications switching method, subscriber terminal... Group communications switching method, subscriber terminal...

2006-11-16

2010-10-12

Ferguson, Keith T (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Plural transmitters or receivers

C455S519000, C455S517000, C455S500000, C455S445000, C455S414100, C370S310000, C370S352000, C370S312000

Reexamination Certificate

active

07813748

ABSTRACT:
A group communications switching method is disclosed. The method includes the steps of: maintaining a voice call between a first subscriber terminal and a second subscriber terminal when it becomes necessary to perform group communications while the voice call is in progress; starting a group communications call by the first subscriber terminal so as to call at least a group communications member other than the first subscriber terminal and the second subscriber terminal; and disconnecting the voice call between the first subscriber terminal and the second subscriber terminal when the group communications call is established.

REFERENCES:
patent: 2004/0127233 (2004-07-01), Harris et al.
patent: 2005/0239485 (2005-10-01), Kundu et al.
patent: 2007/0110029 (2007-05-01), Gilmore et al.
patent: 04-070226 (1992-03-01), None
patent: 2002-016973 (2002-01-01), None

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