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A microwave oven adapted for use within a motor vehicle dashboard area. The microwave oven has a removable storage cassette, and slidable platforms for securing and serving containers of beverages and foods.
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| Number | Title | Issue Date |
| 7365547 | Circuit arrangement for a corrosion protection current feed and for a line test for two-wire lines A circuit arrangement for a line test and for feeding a corrosion protection current into a two-wire line comprises a controllable ramp generator for producing a ramp voltage, at least one first test impedance to be connected to a first line of a two-wire line, at l... | 04/29/2008 |
| 7302047 | Method of detecting remote ground condition Whether or not protection circuitry for a span-powered remote digital subscriber loop unit is properly connected to earth ground is determined by the deliberate assertion and detection of a ground fault from a central office line card location. The span-powered remo... | 11/27/2007 |
| 7206547 | Method of testing electric circuit, and arrangement A method of testing an electric circuit and an arrangement for implementing the method are provided. The arrangement includes a current source connected to a network of electric components, the current source for supplying current to at least one current path of the... | 04/17/2007 |
| 7149285 | Dynamic, automated double-ended system and method for testing and qualifying metallic telecommunication loops A multi-unit test system performs automated and dynamically alterable, double-ended testing of telephone lines, whose service is provided on copper cable pairs. A prescribed set of (e.g., twelve) individual tests are executed either from a hand-held measurement unit... | 12/12/2006 |
| 7136457 | Aircraft cabin telephony test unit A test unit for an aircraft cabin telephony system includes a pair of connectors for inserting the test unit in-line within the system; an AC voltage module that is operative to indicate the presence of an AC voltage when the test unit is connected to the Cabin Deli... | 11/14/2006 |
| 6999561 | Method of detecting remote ground condition Whether or not protection circuitry for a span-powered remote digital subscriber loop unit is properly connected to earth ground is determined by the deliberate assertion and detection of a ground fault from a central office line card location. The span-powered remo... | 02/14/2006 |
| 6975706 | Capacitance measurement-based mechanism for locating open telecommunication line fault To locate an open fault along a telecommunication wireline pair, a prescribed frequency tone is coupled to the wireline pair by way of a center tap of the transformer through which a line card is coupled to a subscriber loop. The line card's analog front end conduct... | 12/13/2005 |
| 6927954 | Method and apparatus for limiting ground fault current A ground fault current-limiting circuit for limiting telecommunication wireline voltage and ground fault current to prescribed safety parameters has a ground fault current sense resistor and associated line voltage control circuit installed in a ground-coupling link... | 08/09/2005 |
| 6826155 | Apparatus and method for facilitating standardized testing of signal lines The present invention provides for an apparatus and a method for testing and evaluating a transmission line. A set of command and data signals is received through an input/output interface. The command and data signals from the input/output interface are processed f... | 11/30/2004 |
| 6754309 | Communication device and access network device Line states are detected accurately to efficiently test subscriber lines, thereby improving the reliability and quality of maintenance and operation. Line monitoring means monitors line states based on at least one of loop information of lines and status information... | 06/22/2004 |
| 6741675 | Method and apparatus for generating an audible tone in DSL environment The invention presented herein is directed to a battery injection and loop supervision (BILS) system and method that can be used in the DSL environment. The BILS of the present invention provides battery injection, loop supervision, and butt set operation mode detec... | 05/25/2004 |
| 6590962 | Method of performing non-interactive resistive fault location A method and apparatus to non-interactively test telephone networks and more specifically to localize faults such as resistive faults in the subscriber loop of the telephone network is presented. The method and apparatus determine whether the fault is in ... | 07/08/2003 |
| 6580783 | 2nd level power fault testing apparatus for testing telecommunications equipment A power fault testing apparatus for testing telecommunications equipment interfaces to Telcordia's 2nd Level AC power fault standards. The apparatus is powered by a three-phase 480 VAC, 600 A power service. A plurality of transformers, includin... | 06/17/2003 |
| 6535580 | Signature device for home phoneline network devices Signature apparatus and techniques that make home networking devices, e.g., in-Home Phoneline Network (herein referred to as "HPN") devices, isolation filters, network interface devices, etc., detectable by commercially available metallic loop termination... | 03/18/2003 |
| 6522723 | Telephony line test unit and method A telephony test system (34) has a communication interface (52, 54, 56) connected to communicate with a remote terminal (16). In response to receiving an electrical test request signal from the remote terminal (16), a controller (50) causes an analog-to-d... | 02/18/2003 |
| 6490342 | Method for quickly testing the operability of a subscriber circuit Test functions to test an operability of a subscriber circuit are integrated in the subscriber circuit. The test functions use existing components and do not significantly burden the signal processor of the subscriber circuit. The subscriber circuit is pr... | 12/03/2002 |
| 6466650 | Telecom service identification transponder apparatus and technique Telephone line service type identification is provided to a telephone technician in the field by the placement of one or more tuned circuit(s) across the telephone line. In one embodiment, an inexpensive tuned circuit such as a ceramic resonator forms a t... | 10/15/2002 |
| 6453016 | Method and apparatus for detecting and locating a fault in a telecommunications environment The invention presented herein is directed to a remotely addressable maintenance unit (RAMU) working in conjunction with a test head at the central office for detecting and locating faults in digital subscriber loop (DSL) and/or plain old telephone system... | 09/17/2002 |
| 6411680 | Telephonic apparatus and input device for telephonic apparatus A telephonic apparatus comprises terminals for connecting it to respective electric cables, telephonic circuitry, and a switch between the terminals and the circuitry. It also includes a sensor for detecting a DC voltage above a first level between said t... | 06/25/2002 |
| 6404855 | Conditioner unit for pair gain test controller A conditioner unit is wired in parallel with a pair gain test controller used to test a digital loop carrier telephone network. The conditioner unit senses a signal intended to request test results from the pair gain test controller and provides a respons... | 06/11/2002 |
| 6343114 | Remotely addressable maintenance unit The invention presented herein is directed to a remotely addressable maintenance unit (RAMU) working in conjunction with a test head at the central office for detecting and locating faults in digital subscriber loop (DSL) and/or plain old telephone system... | 01/29/2002 |
| 6205201 | Telephone line testing device A telephone line testing device detects the integrity of a telephone loop connected to a subscriber's modular telephone jack. The device includes a modular connector at a far end of a flexible electrically conductive cable, the other end of the cable term... | 03/20/2001 |
| 6128368 | Apparatus for monitoring telecommunication transmission An apparatus for monitoring telecommunication transmission is disclosed that a resistance detection unit having a plurality of resistors connected in series is connected between an input terminal of a transformer in a power supply at an absolute ground po... | 10/03/2000 |
| 6091338 | System and method for safety protection of XDSL circuitry A safety protection system and a related operational method for the electrical protection of users of XDSL communication circuitry. The system is based on continuous monitoring of the current parameters on both the exchange and the remote subscriber ends ... | 07/18/2000 |
| 6052453 | Coin operated telephone auditor A low-power, integrated coin acceptor for a payphone containing audit circuitry is described. The integrated coin acceptor connects to the telephone tip, ring and ground lines and connects to a dumb or smart payphone chassis to provide both coin validatio... | 04/18/2000 |
| 6026146 | Automated voice terminal protocol identification system The automated voice terminal protocol identification system automatically identifies the nature of the voice terminal that is connected to the voice terminal test facility in a manner that ensures that neither the voice terminal nor the voice terminal tes... | 02/15/2000 |
| 5978449 | Qualifying telephone line for digital transmission service A telephone wire pair is qualified for digital signal transmission by central office testing. The tip-to-ring capacitance of the wire pair is measured while applying to the wire pair an AC test signal at 600 Hz. The test signal at this frequency minimizes... | 11/02/1999 |
| 5974363 | Self-testing of smart line cards Automatic testing a group of line circuits on a smart line card served by a central switch over a PCM bus is localized by using the microprocessor/DSP that provides codec functions for the group of line circuits. Tests such as DC overhead that are not per... | 10/26/1999 |
| 5881130 | Fast and noise-insensitive load status detection Method and apparatus for detecting whether load coils are attached to a telephone line. A stimulus waveform having multiple frequency components is applied to the line. The current and voltage at the near end of the line are coherently sampled and transfo... | 03/09/1999 |
| 5606592 | Method and apparatus for analyzing resistive faults on telephones cables Resistive faults are analyzed on a conductor in a telephone line by first charging the conductor to an initial voltage. The conductor is allowed to float for a finite amount of time, allowing some of the charge on the conductor to leak through any resisti... | 02/25/1997 |
| 5465287 | Subscriber line impedance measurement device and method A device and method for line impedance measurement using a multi-frequency test signal waveform in a signal injection technique featuring analysis of acquired line test response data. A multi-frequency test signal waveform is injected into the susbscriber... | 11/07/1995 |
| 5392327 | Termination unit with maintenance facility There is a demand for user access to ISDN services at the two-wire interface point. The frequently raised objection to such access is the problem of determining the location of a fault and hence the responsibility for the fault. This is solved by the use ... | 02/21/1995 |
| 4924489 | Customer line tester Apparatus is described for testing a telephone line between a customer's telephone and a local exchange associated therewith. The apparatus comprises a field unit positioned between the customer's telephone and the line, an exchange unit positioned at the... | 05/08/1990 |
| 4912755 | Line current test device A compact, unitary test device for use with telephone line conductors connected to customer premises telephone equipment comprises a first test circuit for terminating the conductors of the telephone line and for measuring current therein. The device also... | 03/27/1990 |
| 4691337 | Method and apparatus for determining the value of analog voltages occurring on telephone subscriber lines of a digital telephone exchange Analog voltages are collected by scanning the two wires of a subscriber line; the values are subjected to an analog-digital conversion and fed to a microprocessor (MC) which computes the desired measuring values from the results of said conversion. Thus, ... | 09/01/1987 |
| 4631475 | Method of detecting hazardous line voltages over a two-wire line A method of detecting hazardous line voltages over a two-wire line for transferring digital information. At one end, the line is terminated by a hybrid coupler (G) and an apparatus for adaptive echo elimination. This apparatus generates a digital signal (... | 12/23/1986 |
| 4611101 | Method and apparatus for testing communication systems A microcomputer controlled apparatus and method for testing communication lines including circuits serving multiple functions in the measurements of line electrical and noise characteristics. A current divider, an analog to digital converter, a constant c... | 09/09/1986 |
| 4528427 | Test system and device for locating short circuits and open circuits in a two-lead line The test system locates short circuits and open circuits in a two-lead line with respect to a test device inserted in the line. A first-frequency (F) detector, a second-frequency (F) generator and a predetermined voltage generator are selectively connecte... | 07/09/1985 |
| 4467148 | Telephone line analyzer A telephone line analyzer provides automatic attenuation measurement of tie trunk lines and other telephone lines through measurement of the electrical level of a tone responder. The analyzer is primarily directed to testing telephone lines interconnected... | 08/21/1984 |
| 4424479 | Loop fault location Circuitry, and associated methodology, for locating resistive shunt faults on a cable pair comprises DC source (120) and current sensors (121,122) which provide measured information utilized to estimate the resistance of the pair between the fault and a t... | 01/03/1984 |
