Abstract: A line powered codec which adaptively allows operation with power supplied from a telephone line in many countries as conditions warrant. A startup procedure uses country-specific register settings, which are powered and maintained from a low voltage side other than the telephone line. Thus, during low line power conditions a programmed state of the line powered codec can be maintained even after a power loss in the telephone line. In another aspect, a current and voltage detection module in the line powered codec is always powered from the telephone line. If sufficient power is not present, the line powered codec does not power up. In yet another aspect, a plurality of power rails may be provided.

Abstract: A configurable multi-port modem includes a plurality of hybrids, a plurality of receivers, a plurality of transmitters, and a switching module. Each of the plurality of hybrids is operably coupled to provide 2 to 4 wire coupling for a corresponding one of a plurality of twisted pairs that are coupled to the configurable multi-port modem. Each of the plurality of receivers is operably coupled to convert inbound DSL signals into inbound data. Each of the plurality of transmitters is operably coupled to convert outbound data into outbound DSL signals. The switching module is operable to couple at least one of the plurality of hybrids to at least one of the plurality of receivers and to at least one of the plurality of transmitters based on a configuration control signal.

Abstract: The method and system determines if modem pulse dialing has been requested in a telecommunication system having both a modem and an associated modem driver. When modem pulse dialing is requested, a fast timer is activated by the modem driver in association with a slow timer in the modem by stopping the fast timer, calculating a divisor value to set-up an interrupt period for the pulse dialing and restarting the fast timer utilizing the interrupt period. The fast timer is started and stopped by enabling/disabling timer interrupts. By synchronizing the fast timer and the slow timer to count in millisecond increments with the modem continuously operating utilizing both the slow timer and the fast timer, the timer resolution necessary for modem pulse dialing is produced. The modem releases control to the operating system during inter-digit delay time.

Abstract: A method and system for improved detection of analog signals, where the analog signals may be composed of one or more analog frequencies. In the method and system, an analog signal is received. A stream of data samples is created from the analog signal. Based on the stream of data samples, a confidence factor regarding the presence of the one or more analog signals is created. The confidence factor is created based upon a confidence factor calculated for each of the one or more analog frequency signals. The confidence factor calculated for each of the one or more analog frequency signals is calculated utilizing incremental energies associated with each of the one or more analog frequency signals.

Abstract: Codec circuit for increasing the data transmission rate in a modem transmission with a first programmable digital filter (13) which is connected into a transmission signal path of the Codec circuit, a second programmable digital filter (22) which is connected into a reception signal path of the Codec circuit, a modem signal detection device (31) for detecting whether the transmission signal which is output on the transmission signal path or the reception signal which is received on the reception signal path is a modem signal, the modem signal detection device (31) switching the first and second digital filters (13, 22) to a widened filter bandwidth when a modem signal is detected.

Abstract: Devices, softwares and methods selectively limit a duration of an individual modem-on hold session. A network device receives and holds data for an individualized on-hold timeout time limit for each user, such as an ISP subscriber.

Abstract: A communication system for communicating over a Universal Serial Bus comprising a data pump and a controller is described. The data pump is physically separated from the controller element and is responsible for conventional signal processing operations such as might be performed by a digital signal processor (DSP) The data pump communicates with the controller via a predetermined communications protocol. The controller is, typically, co-located with a host computer and is responsible for commanding/communicating with the data pump. Physically separating the modem controller function from the modem data pump function allows the manufacturing of lower cost modems. Functional separation also allows either a modem's control or data pump operations to be repaired or upgraded independently of one another. The data pump is minimally equipped to perform only those communications control and data transfer functions that require time critical performance.

Abstract: A method of generating a tone from a human interface device (HID) or keyboard (including a speaker) responsive to manipulation of a key on the HID is described. A key manipulation at the HID is detected and a keyboard tone usage corresponding to the detected key manipulation is determined. A tone is generated from the keyboard speaker responsive to the detected key manipulation and based on the keyboard tone usage. The keyboard tone usage specifies the volume, duration, and frequency of the generated tone Another aspect includes a method of configuring the keyboard to generate a tone responsive to manipulation of a key. A connected keyboard device is detected and a keyboard tone usage corresponding to the detected keyboard device is determined. The keyboard tone usage is stored on the keyboard device specifying the tone to be generated.

Abstract: Disclosed is an initializing method of an xDSL modem in which a gain of an amplifier for the reception is set to the maximum to detect a received signal when a communication channel is established and to determine whether, after requesting to establish the communications channel, the received signal is noise or a real xDSL signal.

Abstract: A codec selector, and a corresponding method for establishing media channels between a local endpoint and a remote endpoint, are disclosed. The codec selector and method are useful with a media endpoint that is constrained to have matching transmit and receive codecs. The method comprises sending a request to a remote endpoint to open a first transmit channel. Upon receiving a corresponding request from the remote endpoint for its transmit channel, the two requests are compared. If the two requests do not match, the first transmit channel is closed (whether or not it has been acknowledged by the peer). A second transmit channel, compatible with the remote endpoint's request, is then requested. A method for detecting that the remote endpoint is using a similar procedure, and a procedure for synchronizing when both endpoints are constrained, are also disclosed. The present invention reduces call setup time in most instances, and provides reliable channel setup for constrained endpoints.

Abstract: The invention relates to a digital device for detecting the hold by an apparatus of a telephone line into which is plugged a modem employing band superposition transmission, the modem sending a send signal on the telephone line and receiving from this line a digitized reception signal, characterized in that the said device comprises: a means for providing a parameter of the transfer function of the send signal on the reception signal, the said parameter being characteristic of the presence of at least the said apparatus on the line, control means for controlling the interruption of the exchanges of signals of the modem on the line, the said control being dependent on the said parameter of the transfer function. The invention also relates to the method implemented by the device of the invention, a modem comprising this device and a server of an Internet access provider using such a modem.

Abstract: The present invention establishes a communications link between a central office (CO) modem and a customer premise equipment (CPE) modem. The CO modem then evaluates the performance of the communications link. Impairments on the communications link are identified based on the evaluation results. Next, adjustment parameters for improving the performance of the communications link are determined. The CPE modem is then modified in accordance with the determined adjustment parameters to establish an adjusted communications link between the CO modem and the CPE modem. In this way, impairments such as bridged taps and cross-talk can be avoided.

Abstract: A system and method for remote maintenance and service of one or more wireless modems in communication with a wireless hub is provided. The system and method include the capability of the wireless hub to instruct the wireless modem(s) to change any operational parameters in order for the wireless hub to diagnose any problems with or to improve operation of the wireless mode.

Abstract: A communication system is provided with a power supply budget such that portions of a phone line side circuit are powered from the TIP and RING phone lines while using standard electronic devices for the hookswitch circuits and the diode bridge circuit. For example, low voltage converters in the phone line side circuit are powered from the phone line. The low voltage converters operate off a low voltage power supply of approximately 2.5 V or less, more preferably operate off a low voltage power supply of approximately 2.0 V or less, and in one embodiment 1.9 V converters are utilized. In one embodiment, the communication system further includes a capacitive isolation barrier system for isolating the phone line side circuitry.

Abstract: In the present invention, when a procedure signal specified in a predetermined Recommendation is received from an answering side, a variable signal detection section detects signal components each at one of a plurality of frequencies from the procedure signal. Based on the detected result in the variable signal detection section, a comparison section outputs an identification signal indicative of a type of Recommendation. Based on the identification signal, a control section of a host controls the switching of operation modes of a modem.

Abstract: In a wireless V.24 data transmission system operating between a data terminal and a data transmission device for data telecommunication having a first data transmission apparatus connected to the data terminal by means of a V.24 cable and a second data transmission apparatus connected to the data terminal by means of a V.24 cable, the apparatus may in turn be connected for wireless communication by means of an air interface. In order to control data transmission in such a way that baud rate changes can be easily detected, the baud rate is detected by the first data transmission apparatus while the autobauding function is activated in the first data transmission apparatus and in the data transmission device. The baud rate is transmitted by signaling to the second data transmission apparatus and is regulated therein parallel to the command data (AT commands) to be sent.

Abstract: A method and apparatus for automatically establishing a data connection includes a telephone line interface circuit coupled to a subscriber telephone line, and a modulator and demodulator circuit coupled to the telephone line interface circuit. A control circuit is coupled to the modulator and demodulator circuit and conditions the modulator and demodulator circuit to establish a connection to the subscriber telephone line and comprises circuitry to determine whether a central office to which the subscriber telephone line is connected is a tone-dial central office or a pulse-dial-only central office, whether a dialing prefix is necessary to access the subscriber telephone line, and whether the call waiting feature is activated on the subscriber telephone line.

Abstract: Known modems coupled in parallel to a coupling need a sharing apparatus, which can be avoided by providing each modem with a detector for detecting upstream/downstream signals to be transceived by an other modem coupled to said coupling in parallel. Preferably, the detector comprises a distinguisher for distinguishing upstream signals and downstream signals, like for example two bandpass filters, one for the upstream and one for the downstream. A further filter, like for example a highpass filter, between coupling and detector, prevents the modem from interfering with other (possibly transceiving) modems. The modem should have an active/passive state corresponding with a lower/higher impedance, which can be realised with a hybrid.

Abstract: An autobaud mechanism is executed by transceivers coupled to opposite ends of a communication loop, such as an extended range SDSL loop, to resolve the maximum data rate that can be supported by the loop, using signal power and quality measurements to first estimate the length of the SDSL loop and thereafter iteratively adjust baud rate and/or number of bits/per baud, as necessary, to realize an SDSL baud rate that will ensure error-free transmission over the loop.

Abstract: A method and system for communicating between a number of computers within a residence over an active telephone network, and for communicating data between a telephone exchange and the residence in a first data band concurrently with the computers communicating in a second data band over the telephone wiring network with the residence. A modem bridges communication in the first data band and the second data band enabling the computers to communicate with the telephone exchange, which may provide a data path to other computers, for instance over the Internet. In addition, signals such as video signals can be distributed within the residence in an additional high-frequency band making use of common circuitry for both data and video communication.

Abstract: The present invention provides systems and methods for the communication of data over telephone lines. A handset orientation tolerant bi-directional acoustic modem according to the invention includes a first transducer operable as a receiving unit under a first condition and as a transmitting unit under a second condition, a second transducer operable as a transmitting unit under the first condition and as a receiving unit under the second condition, and a controller capable of determining the presence of one of the first and the second condition. The presence of the first condition or second condition depends on how the microphone and the speaker of a telephone handset are aligned with respect to the two transducers. The acoustic modem determines the alignment by listening for a detectable dial tone, and then under the first or the second condition, the acoustic modem automatically transmits data to a central site for analysis.

Abstract: A gateway for communicating telecommunication information between a telecommunication network and customer premises equipment includes a telecommunication interface and a packetization module. The telecommunication interface receives first telecommunication information for a first subscriber and second telecommunication information for a second subscriber.

Abstract: An on-hook/off-hook detection circuit (61) detects the voltage level of a telephone line C and thus detects whether the audio band communication using the telephone line C is in on-hook state or in off-hook state thereby to output a status detection signal (81). TEQ (63), FEQ (66) and a constellation encoder gain scaling (67), based on the particular status detection signal (81), conducts the data communication by the adaptive equalization, the bit allocation and the gain allocation in the time domain and the frequency domain using separate tables (75 to 80) for on-hook and off-hook states. In on-hook state where no telephone is used, the transmission subcarrier is extended or shifted up to the neighborhood of-the audio band and the communication is conducted using up to the audio band.

Abstract: A method of allowing a telephone network user to initiate a call feature request during an in-progress call using a conventional touch tone telephone with a telephone handset and conventional touch tone telephone keys. The method includes receiving and recognizing a touch tone signal resulting from the user pressing one or more of the telephone keys, recognizing a user spoken predetermined voice command, then interpreting the touch tone signal and voice command as a request for a call feature.

Abstract: A digital subscriber line (DSL) multiplexer is used in conjunction with a DSL modem to provide a reliable high speed connection for an end-user. The scaleable DSL multiplexer supports multiple DSL modems to a number of subscriber desiring increased bandwidth. The connection is reliably maintained by the multiplexer which utilizes a proprietary protocol to exchange management information to monitor the connection.

Abstract: A voice transmitter includes a first selector for selecting an output of DTMF encoding means or that of voice-DTMF encoding means; DTMF transmission control means for monitoring each state, and for controlling selecting operation of the first selector; DTMF detecting means; and a second selector for selecting an output of voice encoding means or an output signal selected by the first selector by the DTMF detecting means.

Abstract: An improved telecommunication device for simultaneous and independent communication of analog signals and digital data is disclosed. Processing of analog signals enables functions including, for example, message saver, speakerphone, caller identification and fax. Processing of digital data enables functions, including, for example, DSL modem communications, digital voice communications, video communications, and voice-over-data communications. The disclosed system may operate independently or coupled to one or more computers.

Abstract: A system for providing a bi-directional digital subscriber line connection to a network includes a digital subscriber line access multiplexer with a pool of digital subscriber line modems, and switching logic connecting customer premises to the modem pool. The switching logic has more inputs than outputs, and is configured to share access to the modem pool among the inputs on a per-session basis. A session has a dedicated modem connection to the network to provide a limited number of simultaneous dedicated digital subscriber line bi-directional connections to the network.

Abstract: A method and system for distributing broadband digital and telephone signals arriving at a subscriber's home simultaneously over existing in-house four wire quad cable. The combined telephone and broadband signals entering the house are split upon entering the house and the broadband signals are converted to a locally generated broadband digital signal whose power spectral density is not distorted by recovery of the telephone signal, such as a 10Base-T signal. The locally generated combined broadband digital signals and telephone signals are distributed to broadband transceivers where the telephone signals and broadband digital signals are applied to telephones and broadband service termination devices, respectively.

Abstract: A modem using digital subscriber line (DSL) provides high speed access over a copper plant. The DSL modem exchanges management information to a terminating multiplexer using a proprietary protocol, thus enabling reliable, fast access to networking resources.

Abstract: A method of transmitting one or more audio file attachments in an electronic message from a telephone including the steps of dialing into a predetermined telephone number, sending one or more DTMF signals on the touch-tone telephone corresponding to a preselected email address wherein the one or more DTMF signals is associated with a predetermined alphanumeric character, assembling a string of alphanumeric characters by repeating the DTMF signal entry until the preselected email address has been completed, recording an audio voice message over the touch-tone telephone, converting the audio voice message into a digital audio file, attaching the digital audio file to an electronic message directed to the preselected email address, and transmitting the electronic message to the preselected email address.

Abstract: Mobile terminated calls arriving at a network access server configured as an Interworking function (IWF) are routed to a particular modem in the network access server by means of a table maintained at the interface to a communications network receiving the call. The table maps called party numbers (or call reference values uniquely assigned to each call) to a particular modem channel number and slot number for a modem that has already been assigned to the call.

Abstract: The methods bypass present lengthy modem renegotiations (typically 20-30 seconds) to effect fast reestablishment of ISO Application-Oriented Layer communication link between user Application Programs/Browsers and Internet Service Provider, and enables complete session continuity without user being aware of noticeable difference due to frequent connections/disconnections of PSTN line. The methods at its most basic essence requires that the reconnecting incoming calls be routed to the same Port #/Modem unit/Data channel.

Abstract: An apparatus and method for ascertaining states of a telephone line. A communication device, such as a modem, is coupled to a telephone line that also has other communication device or devices coupled to the line. The state of the line is determined before the modem goes off-hook. An energy level of a capacitor that is coupled to the telephone line is ascertained by a data pump of the modem. Should the energy level of the capacitor exceed a threshold, then the telephone line is in use and the modem does not go off-hook. If the energy level is at or below the threshold level, then the modem goes off-hook. In another implementation, an energy profile is established for the other communication devices when they transition from an on hook state to an off hook state and vise versa. The energy profile can be detected by the data pump to ascertain the state of the telephone line or the state of the communication device.

Abstract: A modem that handles interruptions caused by call waiting signals is described. When the modem detects a call waiting signal, the modem alerts the user to the presence of the call waiting signal, and permits the user to answer the incoming call by taking a local phone that is connected to the modem off-hook. When the local phone is taken off-hook, the modem automatically generates a hook-flash signal to switch to the incoming call. When the user places the local phone back on-hook, the modem generates another hook-flash signal to resume (if possible) the modem connection. Additionally, the modem prevents a “fallback”, in which the modem switches from its current protocol to a lower-speed protocol, during a “retrain” process caused by a call waiting event.

Abstract: Detection by a PBX of an incoming call started by a modem The basic idea of the present invention consists of taking advantage of the compatibility of almost every modem to a specific protocol called AT or Hayes commands. According to the present invention, the AT-commands will be used to generate a code specifying that the far end telecommunications device which just dialed is a modem. Therefore, when the dialed telecommunications device is connected to a PBX, latter will have to recognize said code after which it will transfer automatically that call to this telecommunications device identified by the dialed extension phone number and being a modem. Then a telecommunications connection between both modem will be set up. Advantageously, it is then possible by using present invention to connect several different telecommunications devices on a PBX, all being identified by the same extension phone number like a telephone, a FAX and a modem.

Abstract: A digital subscriber loop (DSL) modem and methods for controlling a DSL modem are provided which support simultaneous voice and data communications, wherein the voice communication is provided in a first frequency range and the data communication is provided in a second, non-overlapping frequency range. A voice communication is detected in the first frequency range and the output power associated with the data communication in the second frequency range is reduced when a voice communication in the first frequency range is detected. Furthermore, the coding level associated with the data communication in the second frequency range may be increased when a voice communication in the first frequency range is detected. Also, the start frequency associated with data communication in the second frequency range may be increased when a voice communication in the first frequency range is detected.

Abstract: A telephone communication system is implemented to enable data communication and ring signaling to coexist on a subscriber loop. The communication system transmits data during the silence intervals of a ringing cadence and withholds the transmission of data during the occurrence of a ring signal. To ensure the transmission of reliable data, the communications system allows ring signals to occur and retransmits any interrupted data during the silence intervals between the ring signals. In another embodiment, the transmission of reliable data is ensured by delaying the ring signals until the data currently being transmitted is successfully and reliably received. Accordingly, in either embodiment, the reliability of data communication during the occurrence of a ringing cadence is preserved, and, therefore, data communication is allowed to coexist with ring signaling over a subscriber loop.

Abstract: A method and apparatus for establishing a connection between a server and a remote device over a communication network. Data transmission is attempted at a first carrier frequency and bit rate. If transmission is unsuccessful, the bit rate is lowered. If transmission remains unsuccessful, the carrier frequency is changed to a second carrier frequency. As data transmission continues, the bit rate may be interactively increased or decreased in order to maximize data transfer throughput.

Abstract: A modem is incorporated into a laptop computer and directly connected to either a cellular phone, a land line, or both. The modem is provided with two connectors, one for connection with a cellular phone or external DAA, the other for connection to a normal land line via an internal DAA. The modem selectively enables either the connector for the cellular phone or external DAA, or the connector for its internal DAA. The modem defaults to selecting the cellular phone or external DAA if it is connected, and only if they are not connected selects the internal DAA. These defaults can be overridden by user commands. Further, the modem can independently power down a connected internal DAA, external DAA, or cellular phone to conserve power.

Abstract: A communication server (58) includes a plurality of pairs of frequency agile modulators (638) and demodulators (640) each set to operate at a unique frequency and associated with a twisted pair data line (54). The communication server (58) also includes a plurality of pairs of demodulators (644) and modulators (646) that each have a designatable operation frequency and are associated with one of a plurality of XDSL modems (648). A mixer (642) operates to combine signals from the frequency agile modulators (638) and provide the combined signal to the demodulators (644). The mixer (642) further operates to combine signals from the modulators (646) and provide the combined signal to the frequency agile demodulators (640). A detector (634) operates to detect a need for data service on a selected twisted pair data line (54).

Abstract: A splitterless DSL modem (200) with an integrated off-hook detector (260) prevents data loss and/or disconnections as a voiceband device (154) coupled to the same transmission line (150) transition between steady states. The splitterless DSL modem (200) include a DSP (260), an interface (250) to a twisted pair wire line (150), signal converters (220, 222), and various filters (230, 240). The off-hook detector circuit (260) can be coupled to the interface (250) on the analog side of the DSL modem (200) or on the digital side of the signal converters (220, 222).

Abstract: A digital subscriber line communication system does not require the use of a plain old telephone service (POTS) splitter in the resident's home. Digital signal-processing techniques are utilized to accommodate varying subscriber line conditions coming from POTS telephone equipment. The digital signal-processing techniques eliminate the need for a splitter by reducing susceptibility to distortion resulting from varying subscriber line characteristics. The digital subscriber line modem can utilize quadrature amplitude modulated (QAM) signals and frequency division multiplexing. The digital subscriber line modem includes a control circuit that implements an echo canceler and an analyzer to reduce near-end cross-talk noise. The analyzer performs spectral analysis to preemphasize or to predistort the transmitted signals in accordance with the cross-talk noise.

Abstract: A combination x digital subscriber line (xDSL) and analog modem including a computer bus interface, codecs, an analog front end (AFE) for xDSL communications coupled to a plain old telephone service (POTS) line and a direct access arrangement (DAA) for analog communications also coupled to the POTS line. The modem is designed on a peripheral component interconnect (PCI) card. Generally, ±12, 5 and 3.3 volts are available for PCI components. Traditionally, the AFEs for non-PCI modems were designed to operate on ±12 volts for differential POTS line driving. For differential POTS line driving, the AFE typically requires a regulated voltage. However, ±12 volts supplied to PCI cards are typically not as well regulated as the 5 and 3.3 volts, and therefore the ±12 volts is generally unsuitable for PCI modem AFE design. Furthermore, in computers that operate in different power management modes, ±12 volts may not be available to the PCI card while 5 and/or 3.

Abstract: A battery powered computer system includes an add-on device, such as a modem, with a power supply that uses power from a telephone line to provide power to the modem. In one embodiment the power supply is an adaptive power supply that uses power from both the telephone line and the battery of the computer system. The adaptive power supply determines the maximum power available from the telephone line and delivers that power to the modem. If the power from the telephone line is not sufficient for the modem, the adaptive power supply supplements the power with the power from the computer system. In one embodiment, the adaptive power supply uses power time division multiplexing to share the power from the telephone line and the computer system.

Abstract: The present apparatus integrates a user interactive display with multiple functional telecommunications capabilities such as scanning, facsimile and telephonic capabilities. The display includes a touch sensitive screen overlay on an electrophoretic display and a handwriting controller for recognizing handwritten impressions on the touch sensitive screen overlay. The scanning, facsimile and telephonic capabilities are manipulated by the user through the interactive display. The apparatus also includes additional interface capabilities to compatible printers and remote computers as well as networking capabilities to remote faxes, cellular communications and pagers. Operations through the additional capabilities are also manipulated by the user interactive display.

Abstract: A communication server includes a modem pool (652) that comprises a plurality of XDSL modems (660). The communication server also includes a plurality of line interface modules (650). Each line interface module (650) has a plurality of inputs each coupled to a twisted pair data line and has a plurality of outputs each coupled to one of the XDSL modems (660). Each line interface module (650) operates to detect a need for data service on a requesting twisted pair data line and to couple the requesting twisted pair data line to an output associated with a selected XDSL modem (660). A controller (653) is coupled to the XDSL modems (660) and to the plurality of line interface modules (650). The controller (653) operates to select one of the XDSL modems (660) in response to a detected need for data service.