Dual-circuit telephony
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United States of America Patent
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-
May 14, 2002
Grant Date -
N/A
app pub date -
Mar 25, 1999
filing date -
Mar 27, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A telephone instrument comprises a mechanism for providing signals for transmission, a mechanism for converting signals received by the instrument into output signals, a switching circuit for selectively establishing and terminating a connection between the instrument and a circuit-switched telephone network and for selectively establishing and terminating a connection between the instrument and a packet-switched communication network. When calling, the instrument signals over the circuit-switched network for a network address for the called instrument and the packet-switched network and establishes a dual connection over the packet-switched network if such a network address is received. When receiving a call, the instrument can terminate the call connection over the circuit-switched network and continue the call by way of the packet-switched network.
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