Scaleable voip telephone line circuit
AssigneeZarlink Semiconductor Inc.
InventorsGordon J. Reesor, Zaher Baidas, Paul Nicholas
Life of this patent
Estimating the term…
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.
Claims19
A telephone subscriber line device for providing an interface between a legacy telephone circuit based on circuit-switched technology and a packet network, comprising:
- 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.
An interface to a plurality of legacy telephone circuits based on circuit-switched technology, comprising;
- a plurality of telephone subscriber line devices, each comprising:
- 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 port;
- and
- an expansion bus connected to each cascadable expansion bus port of said plurality of telephone subscriber devices and to a common port on a packet network.
Dependencies are inferred from the claim text.