Mindspeed Technologies, Inc.

Conexant Systems, Inc.

Paul C Wren

Joel D Peshkin

James W Johnston

Gilles G Fayad

Michael S Beadle

Keith T Chu

Jim W Johnston

Skantha Kandiah

Frank Chen

An improved data communication technique may be employed with modems through a packet network. The disclosed technique facilitates a virtual end-to-end connection between two modems such that the two modems can effectively behave as if directly connected to each other, unaware of any modifications to the data being transferred or to the protocols configured within the communication connection. Preferably, a data communication system for carrying out the communication technique demodulates data coming from a first modem, transports the demodulated data in packets between two gateways, and then remodulates the data before delivering to a second modem at the other end. In accordance with various aspects of the present invention, various alternatives for calling and quality of service set-up mechanisms, the establishment of a communication session, the transport of data during a communication session, the flow control between all system components involved, and the mechanisms for the termination of communications are also provided.

Methods and apparatus for data communications through packet networks

Methods and systems are provided for use in a MoIP system including a first modem, a second modem and a third modem. An exemplary communication method includes the steps of receiving a call from the first modem by the second modem over a telephone line, contacting the third modem by the second modem over a packet network, receiving information, from the third modem by the second modem, relating to one or more data compression protocols supported by the third modem, handshaking by the second modem with the first modem to establish a connection, and negotiating a first data compression protocol by the second modem with the first modem, wherein the first data compression protocol is according to the information relating to one of the one or more data compression protocols.

Data compression over packet networks

Various methods and systems for establishing modem relay connections are provided. For example, a modem relay method for use by a first gateway device in communication with a calling modem comprises the exemplary steps of: receiving a call from the calling modem for establishing a communication with a remote modem; requesting a second gateway device to place a call to the remote modem for establishing the communication; transmitting ANSam to the calling modem for a predetermined period of time according to an ANSam message received from the second gateway device in an RFC2833 message via a packet network; monitoring for detection of a CM signal from the calling modem; monitoring for detection of an AA signal from the calling modem; monitoring for receipt of a modulation type message from the second gateway device; and monitoring for receipt of a pass through mode message from the second gateway device.

Modem relay over a packet network

A communication system implements a system for reducing the processing burden associated with detecting an escape sequence in a set of data. The quantity of data contained within the modem's data buffer is intermittently compared to a threshold. While the quantity of data remains above a selected threshold, the data is not checked for an escape sequence. If the quantity of data falls below the threshold, the modem initiates an escape sequence detection procedure. Because the data source waits for a confirmation signal from the modem after sending the escape sequence, additional data will not be received in the data buffer. Thus, the escape sequence is typically among the most recently received data in the data buffer. As the modem processes the data in the buffer, the quantity falls below the threshold, activating the escape sequence detection procedure.

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Valbonne, France

Paul C Wren