Paradyne Corporation

Other

At+t Corp.

At&t Bell Laboratories

Lucent Technologies Inc.

Ingersoll-rand Company

Richard K Smith

Gordon F Bremer

Kenneth David Ko

Kurt E Holmquist

Luke J Smithwick

Thomas Jeffrey Bingel

Joseph Q Chapman

John C Krejci

Ahmad M Hassan

Susan J Seamon

Leland H Lyon

P Michael Henderson

Robert E Scott

Stanley Bottoms

Thomas Armstrong

James L Archibald

Steven D Hunt

D Randy Roberson

William R Davis

A simultaneous voice and data modem coordinates the storage of voice messages and data messages on an audio answering machine and a personal computer, respectively. This allows the called party to subsequently retrieve, via the simultaneous voice and data modem, both a voice message and an associated data message, i.e., a multimedia message, where the called party listens to the voice message while viewing the data message. The called party can retrieve the multimedia message either locally or from a remote location.

Simultaneous voice/data answering machine

A sealing and venting system including an improved piston is for a drill assembly. The drill assembly includes a fluid distributor within the casing with an elongated guide portion having an outer surface, a passage through the guide portion and a port between the outer surface and the passage. The improved piston is slidable within the casing and has an interior surface disposeable about the outer surface of the guide portion. A valve chamber, an exhaust chamber and a drive chamber are defined within the casing. The system includes a sealing surface disposed within the piston passage and slidably engageable with the outer surface of the guide portion to provide a seal between the piston and the distributor. The sealing surface prevents fluid communication between the drive chamber and the exhaust chamber when the sealing surface engages the outer surface of the guide portion, and is provided by an interior surface section of the piston body or by a separate ring seal. Further, an exhaust passage is defined by sections of the interior surface of the piston and of the outer surface of the guide portion when the guide portion is disposed within the piston passage, the passage extending between the sealing surface and the second end of the piston. The exhaust passage establishes fluid communication between the valve chamber and the exhaust chamber through the distributor and piston passages when the sealing surface engages the outer surface of the guide portion on one side of the distributor port.

Venting and sealing system for down-hole drills

A sketching system sketches first notes to be transmitted over a telephone line receives second notes from another sketching system. The sketching system includes a signal de-combiner device, receiving the second notes from the another sketching system and voice data as a combined signal via the telephone line and de-combining the combined signal into the second notes and the voice data. In addition, the sketching system includes a sketching unit connected to the signal de-combiner. The sketching unit includes a note displaying device displaying the first and second notes, a note generating device generating the first notes, and a processor connected to the note displaying and generating devices and to the signal de-combiner, receiving the first notes from the note generating device, receiving the second notes to the note displaying device. The sketching unit further includes a clearing unit selectively clearing one of the note displaying device and another note displaying device of the another sketching system and an erase unit selectively erasing the first and second notes displayed on one of the note displaying device and the another note displaying device. Finally, the sketching system includes a first lock device selectively preventing the processor from transmitting the first notes to the signal de-combiner preventing the first notes from being displayed on the another sketching system, and a second lock device for selectively preventing the processor from transmitting the second notes to the note displaying device.

Sketching unit for transmission of sketches and notes over normal

An adaptive voice and data bandwidth management system is implemented in a subscriber loop to permit higher data rates and adaptive allocation of this increased capacity between multiple applications. The management system communicates digital data across multiple-lines when these lines are not in use by other communication equipment. However, when a request for use of a line by another device is detected, a modem clears down a subscriber line and connects the subscriber line to the appropriate communication device. As a result, simultaneous use of a modem and other communication devices is allowed. Once the other communication device ends its communication session, the system adapts to once again communicate digital data over multiple lines in order to increase the speed and efficiency of the data communication.

Adaptive voice and data bandwidth management system for multiple-line

A multiple line modem and method enable a user to automatically usurp a plurality of telephone lines for data transfer when the telephone is not in use and the ability to switch from multiple line data operation to one (or more) line data and one (or more) line telephone operation automatically when the telephone handset is lifted or an incoming call is detected signaling a request for voice service. The multiple line modem will automatically reestablish the data connection on the line(s) that was used for voice service when the voice service terminates. The multiple line modem allows end to end service that is transparent to the central office. When all lines are operating in data transfer mode, the aggregate data transfer rate is multiplied by the number of lines available for data transport. When one line(s) is operating in voice service mode, the other line(s) maintains data transfer operation at a reduced rate. The line(s) that is used for voice service is adaptively managed by the multiple line modem to provide seamless switching between data transfer mode operation when voice service is not requested and voice service mode operation when voice service is requested.

Multiple line modem and method for providing voice on demand

A method and simultaneous voice/data transmission of signals through a single communications channel wherein the transmitted voice and data signal quality is greatly enhanced over current practice. A time-varying stream of coded voice and data signals is simultaneously transmitted and the sequence of transmitted data signals is determined only after receiving data signals for a predetermined period of time. The received signals are buffered and a received coded data signal sequence is compared to a predetermined plurality of permissible coded data signal sequences to correlate the received coded data signal sequence with the particular permissible coded signal sequence with which the data signal was coded prior to transmission. The correlated data signal sequence is then separated from the combined voice and data signal to recover the coded voice signal. The recovered voice signal and correlated data signal sequence are thereafter decoded to recover the voice and data signals that were received and coded by the transmitter. Timing and equalization of the receiver are also maintained during intervals in which no data signals are transmitted, i.e. 'voice only' mode, by generating in such intervals a data tracking signal for combination with the coded voice signal and transmission of the resulting combined signal to the receiver.

Method and apparatus for simultaneous voice/data transmission

A sketching system sketches first notes to be transmitted over a telephone line and receives second notes from another sketching system. The sketching system includes a signal de-combiner device, receiving the second notes from the another sketching system and voice data as a combined signal via the telephone line and de-combining the combined signal into the second notes and the voice data. In addition, the sketching system includes a sketching unit connected to the signal de-combiner. The sketching unit includes a note displaying device displaying the first and second notes, a note generating device generating the first notes, and a processor connected to the note displaying and generating devices and to the signal de-combiner, receiving the first notes from the note generating device, receiving the second notes from the de-combiner, and transmitting the first and second notes to the note displaying device. The sketching unit further includes a clearing unit selectively clearing one of the note displaying device and another note displaying device of the another sketching system and an erase unit selectively erasing the first and second notes displayed on one of the note displaying device and the another note displaying device. Finally, the sketching system includes a first lock device selectively preventing the processor from transmitting the first notes to the signal de-combiner preventing the first notes from being displayed on the another sketching system, and a second lock device for selectively preventing the processor from transmitting the second notes to the note displaying device.

A multi-media modem is used to provide a security access arrangement that identifies a calling party to a computer system. In particular, a multi-media modem couples both an analog channel and a data channel to the computer system. The analog channel conveys the calling party's identification information, while the data channel conveys a data signal from the calling party. The computer system verifies the calling party's identification information communicated over the analog channel and, if the verification is successful, immediately establishes, or continues, data communications with the calling party over the data channel.

Method for dial-in access security using a multimedia modem

A simultaneous voice and data (SVD) modem includes two analog ports and a data terminal port. Both of these analog ports are capable of transmitting telephone numbers and are coupled to a switching system like a private branch exchange (PBX). The data terminal port is coupled to a data terminal of an SVD user. In one embodiment of the invention, the SVD user, the calling party, sends at least one command to the SVD modem, via the data terminal port. In response, the SVD modem separately transmits, to the PBX, the calling party number from one of the analog ports and the called party number from the remaining analog port. The SVD modem then subsequently communicates any voice signals received on one of the analog ports to the other analog port. This allows a voice call to be switched through the SVD modem, yet requires no modification to the PBX.

Simultaneous voice and data call establishment using a simultaneous

A method and apparatus for control of concurrent communication of analog information and digital information. In general terms, when the communication channel is viewed as a multi-dimensional space, the digital information signal is divided into symbols, and the symbols are mapped onto the signal space with a preset distance between them. The analog signal, generally limited in magnitude to less than half the distance separating the symbols, is converted to component signals and added (i.e., vector addition) to the symbols. The sum signal is then transmitted to the receiver where the symbols are detected and subtracted from the received signal to yield the analog signal components. The transmitted analog signal is recreated from those components. Both half-duplex and full-duplex operation is available in accordance with this invention. The illustrative embodiment includes a controller that is sensitive to input signals applied to the modem disclosed herein. To wit, the control is sensitive to signals from the analog port, signals from the digital port, and signals from the port that carries the combined digital and analog signals. Operation of the near-end modem is controlled as well as operation of the far-end modem.

Controlled simultaneous analog and digital communication

A number of arrangements and methods that achieve concurrent communication of analog information and digital information. In general terms, when the communication channel is viewed as a multi-dimensional space, the digital information signal is divided into symbols, and the symbols are mapped onto the signal space with a preset distance between them. The analog signal, generally limited in magnitude to less than half the distance separating the symbols, is converted to component signals and added (i.e., vector addition) to the symbols. The sum signal is then transmitted to the receiver where the symbols are detected and subtracted from the received signal to yield the analog signal components. The transmitted analog signal is recreated from those components. Arrangements utilizing the above principles are applications where systems that include a digital port can benefit from an analog communication channel, and conversely, where systems that include an analog port can benefit from a digital communication channel.

Simultaneous analog and digital communication applications

A re-authentication procedure between the modems of a public switched telephone network (PSTN) data connection, which is between a computer facility and a user, provides a secure method for protecting the computer facility against an active wire tap, or spoofing, by an intruder. In particular, the user's modem and the computer's modem perform a re-authentication procedure throughout the duration of the data connection. This re-authentication procedure is transparently performed on a side channel of the data connection. This side channel can either be an in-band channel or an out-of-band channel. The re-authentication procedure comprises an exchange of encrypted information between the two modems. If one of the modems detects the presence of an active wire tap, that modem simply interrupts the data connection.

Continuous authentication using an in-band or out-of-band side channel

A secure method of accessing a computer facility is provided within the data communications equipment (DCE), e.g., a modem or a terminal server, by the use of Calling Party Directory Number (CPDN). In particular, a telephone line from the local public switched telephone network is configured to provide CPDN information. This telephone line terminates in the DCE, which stores a plurality of lists, each list comprising a plurality of CPDN numbers. Upon receiving a telephone call from a calling party, the DCE takes one of three courses of action depending on the calling party's CPDN: 1) the DCE can answer the telephone call if the calling party's CPDN is on the 'caller pays' list; 2) the DCE can refuse to answer the telephone call and then return the telephone call if the CPDN is on the 'we pay' list; or 3) the DCE can simply not answer, or return, the telephone call if the calling party's CPDN is not found on any of the plurality of lists.

Data communications equipment security device using calling party

In a system in which data between a master and remote location is encrypted by using the DES algorithm, the status of security devices at the remote location is monitored from a centralized security station. A message indicative of the status of the security devices is used to generate an initializing vector (IV). This IV is then used to encrypt the data from the remote to the master.

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Seminole, FL, United States of America

Richard K Smith