Mindspeed Technologies, Inc.

Michael S Beadle

Jason Brent

Paul C Wren

Skantha Kandiah

Keith T Chu

Michael C Whitfield

Michael M Metzger

Zhihui Chen

Jim W Johnston

Alexey Pynko

Frank Chen

Majid Shaghaghi

Pat D Ryan

There is provided a multi-core system that includes a lower-subsystem including a first processor and a number of slave processing cores. Each of the slave processing cores can be a coprocessor or a digital signal processor. The first processor is configured to control processing on the slave processing cores and includes a system dispatcher configured to control transactions for execution on the slave processing cores. The system dispatcher is configured to generate the transactions to be executed on the slave processing cores. The first processor can include a number of hardware drivers for receiving the transactions from the system dispatcher and providing the transactions to the slave processing cores for execution. The multi-core system can further include an upper sub-system in communication with the lower-subsystem and including a second processor configured to provide protocol processing.

Multi-core system with central transaction control

According to one aspect, a method of switching a first gateway from a voice mode to a facsimile mode comprises: configuring the first gateway to the voice mode for communication with a second gateway over a packet network, receiving a plurality of data packets from the second gateway over the packet network, analyzing one or more of the plurality of data packets, such as UDP packets, and configuring the first gateway to the facsimile mode if the analyzing determines that the one or more of the plurality of data packets carry facsimile data packets. The analyzing may include calculating a length of the UDP payload in accordance with UDPTL packet structure, and deciding the UDP payload includes a UDPTL packet if the calculated length is equal to UDP payload length, as indicated in the UDP header.

Method and system for detecting facsimile communication during a VoIP session

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 high speed modem embodiments are provided, for example, having a receiver configured to receive an analog data signal over a telephone line from a first modem, from which digitized analog data signal samples are generated by a processor employing a linear coding process using, for example, a sampling rate of at least 16 kHz with an 8 bits/sample. Following, the digitized analog data signal samples are transmitted over one or more digital lines of a first time division multiplexed bus to a second modem, which may be a digital loop carrier modem, for example. Thereafter, the second modem may demodulate the digitized analog data signal samples to generate digitized data, which may then be transmitted over one or more digital signal lines of a second time division multiplexed bus.

High speed modem

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

There is provided system and method for communication over a network, which includes a first gateway and a second gateway capable of communicating with each other using a packet protocol. Further, the second gateway is capable of communicating with a communication device, such as a modem device or a facsimile device, over a telephone line. The second gateway receives a call request from the first gateway for the communication device. In response to such call request, the second gateway places a call to the communication device over the telephone line. Next, a tone detector is enabled to detect a tone, such as an answer tone generated by the modem or facsimile device. Second gateway detects the answer tone received from the communication device over the telephone line and enables a filter, in response to the detection of the answer tone, to prevent the answer tone from reaching the first gateway.

Growing community of inventors

Tustin, CA, United States of America

Michael S Beadle