Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Patent
1998-09-09
2000-10-31
Patel, Ajit
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
370356, H04L 1266
Patent
active
061413410
ABSTRACT:
An Internet Protocol telephone system and method uses a telephone (26) to place and receive voice over Internet Protocol (VoIP)-based telephone calls and public switched telephone network (PSTN)-based telephone calls. An off-hook condition with the telephone (26) is detected and a sequence of signals generated by the telephone (26) is received. At least a first signal generated by the telephone (26) is buffered while the system attempts to detect a predetermined signal that signifies a VoIP-based call. Upon detection of the predetermined signal, the system intercepts subsequent signals in the sequence, absent the at least first signal that was buffered, and places the VoIP-based call via an internet (12). Otherwise, the system places the PSTN-based call via a PSTN (16).
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patent: 5563938 (1996-10-01), Soshea et al.
patent: 5726984 (1998-03-01), Kubler et al.
Press Release-InfoGear and CIDCO Launch the i Phone, infoGear Technology Corporation; Las Vegas, Nevada; Jan. 10, 1997.
WebPhone, NetSpeak Corporation; http:///k2nesoft.com/webphone.html; Jul. 21, 1996.
Cotton Timothy
Holland Robert Victor
Jones Wesley Stuart
Creps Heather L.
Motorola Inc.
Patel Ajit
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