Voice-over-IP device using dial-up modem

Details Voice-over-IP device using dial-up modem Voice-over-IP device using dial-up modem

2005-03-09

2009-11-17

Smith, Creighton (Department: 2614)

Multiplex communications

Pathfinding or routing

Combined circuit switching and packet switching

C370S467000, C370S468000

Reexamination Certificate

active

07620035

ABSTRACT:
A network telephone device includes a subscriber line/loop interface circuit (SLIC) for coupling to an analog telephone, a telephony processor coupled to the SLIC, and a dial-up modem coupled to the telephony processor. The telephony processor converts outgoing telephone signals from the SLIC into outgoing data packets, and incoming data packets into incoming telephone signals to the SLIC. The dial-up modem converts the outgoing data packets from the telephony processor into outgoing modem signals, and incoming modem signals to the incoming data packets to the telephony processor.

REFERENCES:
patent: 6459783 (2002-10-01), March et al.
patent: 6763020 (2004-07-01), Hon
patent: 6950441 (2005-09-01), Kaczmarczyk et al.
patent: 2004/0105432 (2004-06-01), Yamaji
patent: 2005/0076149 (2005-04-01), McKown et al.
patent: 2005/0135598 (2005-06-01), Badt, Jr. et al.
patent: 2005/0249117 (2005-11-01), Gerkins
“Ag1170 +5V / +3.3V Low Power Ringing SLIC,” Silver Telecom Products Data Sheet, V1.5 Aug. 2004, pp. 1-15.
Bill Goodman et al., “Internet Telephony and Modem Delay,” IEEE Networks, May/Jun. 1999, pp. 8-16.

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