Intel Corporation

Picazo Communications

Other

Charles Arnold Lasswell

Charles Gregory Sherwood

Gregory J Schultz

Paul K Lee

Lokpraveen B Mosur

David K Cassetti

Ronald Craig Fish

Christopher F Clark

Christopher P Clark

Joon Suk Park

A multi-threaded processor may support efficient pattern matching techniques. An input data buffer may be provided, which may be shared between a fast path and a slow path. The processor may retire the data units in the input data buffer that is not required and thus avoids copying the data unit used by the slow path. The data management and the execution efficiency may be enhanced as multiple threads may be created to verify potential pattern matches in the input data stream. Also, the threads, which may stall may exit the execution units allowing other threads to run. Further, the problem of state explosion may be avoided by allowing the creation of parallel threads, using the fork instruction, in the slow path.

Multi-threaded queuing system for pattern matching

A personal computer includes a PBX control program and one or more switch cards located in expansion board slots. The one or more switch cards are coupled to one or more port expansion units (PEU), which are coupled to telecommunication lines out to the various extension phones at the customer premises. Each PEU contains its own digital signal processor (DSP) so that distributed digital signal processing may be implemented to avoid any bottlenecks. One master PEU is coupled to a switch card by a time division multiplexed (TDMA) bus as well as a packet switched control bus, and all the other PEUs, if any, are coupled to the master PEU by extensions of the TDMA and packet switched buses. The TDMA bus carries PBX real time conversations while the packet switched bus carries control information, voicemail outbound message data packets, and inbound voicemail data packets.

IP packet ready PBX expansion circuit for a conventional personal computer with expandable, distributed DSP architecture

A PBX system using an unmodified personal computer as the host server and using expansion slots to couple one or more switch cards to the system bus, and, optionally including a network interface card to couple the PBX system to other client computers running telephony enabled applications to control the PBX via a local area network. The switch card(s) are each coupled to a chain of one or more port expansion units that do not consume expansion slots. Each PEU contains a DSP and a microcontroller, an FPGA and port interface circuitry to interface to POTS CO lines, extension telephone lines, T1 lines or PRI lines. The personal computer is programmed with a PBX process that controls operations of the overall system and may also be programmed with conventional voice mail applications or integrated voice response and other applications to implement various telephony functions such as recording voice mail or prompt callers to input DTMF tones indicating what they want to do. Each chain of PEUs is coupled to the switch card and the PBX process by a TDMA bus and a packet switched bus. Distributed processing by the DSPs and microcontrollers in the PEUs to do tone generation, tone recognition, and a host of other functions offloads much of the work from the host. The packet switched bus enables easy handling of packetized data in IP packets or other packetized data.

PBX with configurable analog CO line and T1 signalling protocols using packet bus and software switched WAV channels

A PBX system using an unmodified personal computer as the host server and using expansion slots to couple one or more switch cards to the system bus, and, optionally including a network interface card to couple the PBX system to other client computers running telephony enabled applications to control the PBX via a local area network. The switch card(s) are each coupled to a chain of one or more port expansion units that do not consume expansion slots. Each PEU contains a DSP and a microcontroller, an FPGA and port interface circuitry to interface to POTS CO lines, extension telephone lines, T lines or PRI lines. The personal computer is programmed with a PBX process that controls operations of the overall system and may also be programmed with conventional voice mail applications or integrated voice response and other applications to implement various telephony functions such as recording voice mail or prompt callers to input DTMF tones indicating what they want to do. Each chain of PEUs is coupled to the switch card and the PBX process by a TDMA bus and a packet switched bus. Distributed processing by the DSPs and microcontrollers in the PEUs to do tone generation, tone recognition, and a host of other functions offloads much of the work from the host. The packet switched bus enables easy handling of packetized data in IP packets or other packetized data.

A telephone system including a process for redirection of voice mail messages to another voice mail box after a predetermined time or after a predetermined number of attempts at notification by radio pager of the owner of voice mail box in which a new voice mail message has been left have failed to cause the voice mail message to be picked up. The process comprises the steps of: recording the voice mail message, looking up a pager number for the user of the voice mail box in a table, finding an unused outside line, dialing the pager number and looking up a numeric message to be left on the pager in a table which stores a message to be sent for each extension's voice mail box, and monitoring the voice mail box to determine if the message was picked within a predetermined time, if not, redialing the pager and sending the numeric message again (some embodiments send voice messages to the pager) and incrementing a counter, and, after a predetermined number of attempts at notification have failed to cause the message to be picked up, moving the voice mail message to another voice mail box and beginning the process of radio pager notification again.

Digital telephone system with automatic voice mail redirection

A telephone system which detects ring signals and detects caller ID signals and decodes them into caller ID data and then reformats the caller ID data into one or more alphanumeric strings useable by another computer process such as a point of sale computer process. User input is accepted such as by manipulation of switches to control the telephone system so as to add predetermine prefix or suffix codes or data to one or more items of caller ID data in accordance with the occurrence or existence of predetermined conditions that must be signalled to the computer process using the caller ID data being formatted by the telephone system.

Telephone system for formatting caller ID information into a form useable by an application program and exporting the caller information to the application program

A telephone system including improved voicemail wherein a digital signal processor scans data to be recorded in a voicemail message to find DTMF tones or DTMF mimics in the voice data and removes them from the recording. In one embodiment, the DSP scans for DTMF tones or mimics in the stream of data to be recorded and removes them before recording the data. In another embodiment, the DSP scans for DTMF tones and mimics in the stream of data to be recorded, and marks the starting point and ending point in the stream where DTMF tones or mimics are found, records all the data and then goes back to the recording after it is finished and looks for the markers and removes all data between the markers. In another embodiment, the DSP scans the data to be recorded, finds DTMF tones or mimics and then alters the data either in real time or off-line after it has been recorded to remove one or both tones of the DTMF signal so that it will not be recognized as a DTMF tone during playback by any DTMF detector which is active during the playback.

Recording and playing voicemail with improved DTMF detection

A telephone with a selectable level of sidetone for use in noisy environments. The selectable level of sidetone is achieved by forming a switch-controlled feedback path including a gain setting resistor from the output of a transmit amplifier in a hybrid circuit to a summing node virtual ground at one input of a differential amplifier driving the handset speaker. The summing node is also coupled to the audio output port of the three port hybrid so as to also receive incoming audio signals from the tip and ring lines. A microcontroller having configuration data controls whether the switch is closed and the feedback path exists or the switch is open and no feedback occurs. Lower sidetone or no sidetone is useful in phones used in noisy environments such as factory floors or restaurants.

Growing community of inventors

Olathe, KS, United States of America

Charles Arnold Lasswell