Scaleable VoIP telephone line circuit

Details Scaleable VoIP telephone line circuit Scaleable VoIP telephone line circuit

2008-12-11

2010-11-30

Vu, Thong H (Department: 2465)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S442000

Reexamination Certificate

active

07843954

ABSTRACT:
A telephone subscriber line device for providing an interface between a legacy telephone circuit based on circuit-switched technology and a packet network has a legacy interface for connection to telephone circuit; a packet interface for connection to a packet network, processing circuitry for converting between legacy telephone signals and packet signals, and a cascadable expansion bus permitting multiple said devices to be connected to a common port on a packet network. Such a device is highly scalable.

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“An Overview of the Etherphone System and its Applications”, P. T. Zellweger et al., Xerox Palo Alto Research Center, Palo Alto, CA 94304, 1988, IEEE, pp. 160-168.

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