Did You Know...
...that a workman who left the soap mixing machine on too long was responsible for making Ivory Soap? He was so embarrassed by his mistake that he threw the mess in a stream. Imagine his dismay when the evidence of his error floated to the surface! Result: Ivory soap, the soap that floats.
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| Number | Title | Issue Date |
| 7366470 | Inter-modulation distortion compensation An Inter-modulation distortion measurement and correction method which could be applied over a communication channel that is a combination of either or both analog and digital channels. This method is applicable for a communication system between a modem pair. ... | 04/29/2008 |
| 7164763 | Power offloading for a subscriber line interface circuit A power offload network has a node for receiving at least one supply V1. The power offload network includes at least one switch and a power offload element providing a supply drop of VR. The switch is configurable for selecting a linefeed supply level from th... | 01/16/2007 |
| 7162201 | Repeater and method for automatically setting output signal level of repeater A repeater and method for automatically setting output signal level of the repeater is disclosed. The repeater includes: a voltage detection unit for measuring a voltage of signal amplified by a plurality of the amplifiers; a digital variable resist unit for providi... | 01/09/2007 |
| 7149246 | Method and apparatus for reducing oscillator pull in a CMOS wireless transceiver integrated circuit A monolithic transceiver integrated circuit that includes a substrate, a transmitter subsystem of one or more subcircuits on the substrate, and a receiver subsystem of one or more subcircuits on the substrate. Also included is a bias current supply coupled to the re... | 12/12/2006 |
| 7110530 | System and method for providing universal access to voice response systems A present invention comprises a device and method for monitoring dial pulse (DP) signals on a line and recognizing a digit pattern comprising at least one digit on the line. In response to the recognized digit pattern, the invention determines when to initiate trans... | 09/19/2006 |
| 7085372 | Method and device for transmitting a transmission signal via a two-core line Method and apparatus for transmitting a transmission signal via a two-core line, in particular a telephone line, in which case, with the aid of corresponding transmission devices (2, 3), two partial signals are generated and are transmitted via a respective c... | 08/01/2006 |
| 7076056 | Methods and apparatus for a bridge tap moderator Methods and apparatus for protecting quality of service during a process involving bridge tap in a communications system are described. Bridge tap may occur during system construction, central office re-concentration, replacement projects, upgrade projects, expansio... | 07/11/2006 |
| 7068781 | Alarm of a telecommunications terminal connected to a LAN Before any supply of remote power to a telecommunications terminal connected to a local area network, the Ethernet equipment must recognize the power class of the terminal by measuring a specific electrical signature of the terminal via their interconnection. If the... | 06/27/2006 |
| 7062037 | Generic line impedance matching circuit using decomposed configurable transfer functions A technique for implementing impedance matching circuits 100 that use the transfer functions of each line impedance model. This technique allows implementation of an impedance match for a diverse number of line impedances reusing the same circuit 100 t... | 06/13/2006 |
| 7039103 | Asymmetric digital subscriber line methods suitable for long subscriber loops Systems and methods are described for asymmetric digital subscriber loops. A method includes utilizing a circuit having a first end and a second end, the circuit having a first amplification interface connecting the first end to the second end in a first direction, ... | 05/02/2006 |
| 7027594 | System and method for cooling of network interface device A network interface device (NID) for connecting a telecommunications line to a subscriber premises. The NID includes an enclosure that houses wiring, connectors, and active telecommunications devices. A cooling device, such as a fan, is used for cooling the active d... | 04/11/2006 |
| 7023181 | Constant voltage generator and electronic equipment using the same A constant voltage generator is comprised of a band gap reference circuit, a current supply circuit, a starting circuit and a voltage-current conversion circuit, and the starting circuit is further comprised of a first and second load elements, a first transistor wh... | 04/04/2006 |
| 6980648 | Telephone system with current regulation in the constant current region A telephone system includes a transmission line for connection to at least one telephone and a telephone interface in communication with the transmission line. The telephone interface provides DC power when a telephone connected to the transmission line is in an off... | 12/27/2005 |
| 6963641 | Method and apparatus for providing variable attenuation to data signals in an XDSL frequency range An apparatus, system and method for providing variable attenuation to data signals in an xDSL frequency range are disclosed. An attenuation device has a resistive circuit coupled to a capacitive circuit that prevents telephone signals from being attenuated by the re... | 11/08/2005 |
| 6934384 | Subscriber line interface circuitry A subscriber line interface circuit apparatus includes a signal processor having sense inputs for sensed tip and ring signals of a subscriber loop. The signal processor generates linefeed driver control signals in response to the sensed signals. The signal processor... | 08/23/2005 |
| 6920218 | Combination clock and charge pump for line powered DAA Disclosed is a method and apparatus which facilitates the use of existing power that is ordinarily unused or discarded to provide power to a telephone interface circuit when the circuit is in the on-hook state, thereby alleviating the need to use loop current to pow... | 07/19/2005 |
| 6904145 | ADSL front-end in a low voltage process that accommodates large line voltages The asymmetric digital subscriber line receive channel includes: first and second external resistors 20 and 22 coupled to a telephone line 24 and 26; a coarse programmable gain amplifier CPGA formed in a low voltage process having inputs ... | 06/07/2005 |
| 6865271 | Constant current line circuit with class features A line circuit utilizing a differential amplifier whose output is regulated to zero volts D.C. (when the subscriber's set is off-hook) by a negative feedback circuit, for controlling a voltage controlled power supply which provides a constant current feed to the sub... | 03/08/2005 |
| 6856685 | Feed arrangement for a subscriber loop with multi-level current regulation capability A feed arrangement for a telephone subscriber loop. The feed arrangement includes an input for connection to a power supply and an output for connection to the TIP and RING conductors of the subscriber loop. A control element regulates the current in the subscriber ... | 02/15/2005 |
| 6823066 | Digital access arrangement circuitry and method having current ramping control of the hookswitch A digital direct access arrangement (DAA) circuitry may be used to terminate the telephone connections at the user's end to provide a communication path for signals to and from the phone lines. Briefly described, a means for providing a proper hookswitch transition ... | 11/23/2004 |
| 6782096 | Subscriber line driver and termination A subscriber line driver (SLD) is provided for the continuous and automatic transformation of the characteristics of a communication system signal so that the signal conforms to a power spectral distribution (PSD) standard. The signal is transformed by the SLD which... | 08/24/2004 |
| 6718019 | Method and apparatus for wireline characterization The current invention provides a method and apparatus for wireline characterization is disclosed. The method may be implemented with any modulation protocol but is particularly suited for multi-carrier modulation protocols such as discrete multi-tone (DMT). The appa... | 04/06/2004 |
| 6704414 | Telephone line extension A system comprising a base unit and a remote unit for transmitting telephonic data on AC power lines is disclosed. The base unit includes a transmitter section, a receiver section, a power line interface, a telephone line interface, a power supply, and a ... | 03/09/2004 |
| 6633770 | Telecommunication device holster having a retractable earpiece assembly integrated with the holster A holster (10) for a telecommunication device (12), such as a cellular telephone or wireless telephone, includes a housing (14) adapted to removably support the telecommunication device (12). The holster (10) also includes an earpiece assembly (52) includ... | 10/14/2003 |
| 6453043 | Flash-cut of speech processing features in a telephone call A speech processor uses at least two speech processing features to enhance the quality of speech signals received by a user during a telephone call. The speech processing features are applied to the speech signals. However, the user only hears speech sign... | 09/17/2002 |
| 6301358 | Dual-slope current battery-feed circuit A dual-supply line-interface circuit (100) uses a -48V power supply (V.sub.BAT1) to drive long subscriber loops (120) and uses a -28V power supply (V.sub.BAT2) to drive short subscriber loops. For intermediate-length loops, a dual-slope current-feed profi... | 10/09/2001 |
| 6289099 | Ringer for satellite user terminals An apparatus, system, method, and computer program product for providing a flexible ringer for multiple deskset phones. A controller detects a flag message that precedes an incoming telephone call, and selects one or more frequencies based on a local expe... | 09/11/2001 |
| 6263076 | Arrangement in a subscriber line interface circuit A control processor is connected to a subscriber line interface circuit to control the operating mode of the line interface circuit and monitor, via a detector output terminal of the line interface circuit, the status of the line connected to the line int... | 07/17/2001 |
| 6218930 | Apparatus and method for remotely powering access equipment over a 10/100 switched ethernet network Apparatus for remotely powering access equipment over a 10/100 switched Ethernet network comprises an Ethernet switch card with a phantom power supply for remote access equipment and added circuitry for automatic detection of remote equipment being connec... | 04/17/2001 |
| 6195429 | Arrangement in a subscriber line interface circuit In a subscriber line interface circuit connected to a telephone line having a high potential wire and a low potential wire, an arrangement for generating a signal for determining the line voltage comprises means (7, 10, 11) for alternately charging a capa... | 02/27/2001 |
| 6125179 | Echo control device with quick response to sudden echo-path change An Acoustic Echo Control (AEC) device operates to reduce acoustic echo feedback in a speakerphone. An adaptive echo canceller responds to a far-end speech signal to generate an estimated echo which is subtracted from a near-end speech signal, to generate ... | 09/26/2000 |
| 6021194 | Flash-cut of speech processing features in a telephone call A speech processor uses at least two speech processing features to enhance the quality of speech signals received by a user during a telephone call. The speech processing features are applied to the speech signals. However, the user only hears speech sign... | 02/01/2000 |
| 5896449 | Voice enhancement system and method A system (130) for providing enhancement to a voice-band signal in a telecommunications network (138) is provided. The present system (130) includes a power averager (18) for determining the average power of the voice-band signal. The present system (130)... | 04/20/1999 |
| 5889854 | Technique for compensating for signal attenuation on a telephone line An apparatus compensates for an attenuation of a signal on a telephone line in a communication system connected to the telephone line via a transformer. A photo coupler detects a loop current at a primary winding of the transformer. A controller generates... | 03/30/1999 |
| 5862213 | Circuit arrangement for generating charge pulses A circuit arrangement for generating charge pulses during digital telecommunications is indicated, whereby subscribers (Tln) of a telephone network are connected by cables with an exchange. The subscriber telephones are connected by electric service lines... | 01/19/1999 |
| 5828748 | Method for customizing operation of a line interface circuit in a telecommunications network A method for reducing frequency-related power losses in a telecommunication line interface circuit comprises operating a switching converter circuit at an optimum frequency. Determination of the optimum frequency is based upon a subscriber loop length. Pa... | 10/27/1998 |
| 5818926 | Switching device for telecommunications channel A switching device for a telecommunications channel. The device comprises a voltage detector, a switch, and a storage device. The voltage detector produces an output voltage if the voltage between the lines of the channel exceeds a predetermined level, fo... | 10/06/1998 |
| 5802164 | Systems and methods for controlling telephone sound enhancement on a per call basis In a communications system containing signal enhancement circuitry capable of selectively enhancing portions of a plurality of signals carried on a corresponding plurality of channels through the signal enhancement circuitry, a system and method for contr... | 09/01/1998 |
| 5708703 | Wide range equalizer with line length detection An automatic line equalizer for use with a T1 or an E1 repeater in a telecommunications system is disclosed. The equalizer includes a first equalizing means for equalizing an input line having a line length falling within a first range and a second equali... | 01/13/1998 |
| 5689551 | Caller ID system with prescaler A caller ID system is disclosed in which a prescaler is coupled between a source of a caller ID signal and a caller ID receiver, and a processor is coupled to the caller ID receiver. The prescaler is responsive to the processor for scaling the caller ID s... | 11/18/1997 |
