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| Number | Title | Issue Date |
| 7245667 | Method of transmitting data In a data transmission method, the data to be transmitted and/or data corresponding to the same are transmitted via a first transmission channel and in addition via a second transmission channel. The data transmitted via the first transmission channel and the data t... | 07/17/2007 |
| 7190716 | Line powered loop extender with communications, control, and diagnostics A Digital Subscriber Line (DSL) network for improving the transmission of DSL signals includes a plurality of local loops for transmission of upstream and downstream DSL signals, control signals, and Direct Current (DC) power, a plurality of loop extenders with comm... | 03/13/2007 |
| 7092362 | Terminal extension repeater An extension repeater which interfaces between a digital service network and a local network span combines extensive diagnostic and operational functions in a single, space-efficient device. The functions include simultaneous loopback capability in both the directio... | 08/15/2006 |
| 6959257 | Apparatus and method to test high speed devices with a low speed tester An apparatus coupled to a low speed tester and a device is disclosed. The device may have a first speed faster than a second speed of the low speed tester. The apparatus may be configured to allow the low speed tester to perform high speed tests of the device at the... | 10/25/2005 |
| 6813339 | Telecommunications line test extension apparatus An apparatus is provided for testing a communications line. The apparatus comprises a spool having at least eight terminals, and a length of wire wound on the spool. The wire has at least four subpairs of wires, each of which has opposite ends. A first end of each o... | 11/02/2004 |
| 6606372 | System and method of testing an IDSL communications line A method and system is disclosed for testing an IDSL communications line. Transmission elements are queried sequentially within an IDSL communications line. A predetermined period of time is waited after querying a transmission element for a correct respo... | 08/12/2003 |
| 6356623 | Method for communicating on an equipment network A method is provided for communicating on an equipment network. According to the method, a message is sent from a sending equipment unit to a receiving equipment unit as a signal having a nominal power. Whenever the signal is amplified by an intermediate ... | 03/12/2002 |
| 6154770 | Internetwork communication system using tiers of configurable multiple bandwidth capacity modes of operation An internetwork that is especially designed to seamlessly compensate for a failure in the system, and to allow the testing of modifications to the system, without interrupting the normal systems operations. The internetwork is especially useful for financ... | 11/28/2000 |
| 6091802 | Telecommunication system tester with integrated voice and data An apparatus and method for testing a telecommunication system, which runs telephony applications such as voice-mail, telephone banking systems, automated directory assistance, and multi-branched telephone customer service systems. The apparatus includes ... | 07/18/2000 |
| 5887050 | Repeater apparatus having isolation circuit A repeater apparatus includes a first trunk circuit for receiving and sending data input from and to a first section of the communication link and a second trunk circuit for receiving and sending data input from and to a second section of the communicatio... | 03/23/1999 |
| 5862200 | Ground fault detector for T1 span equipment A ground fault detector for TI span equipment for transmitting signals from a central office to a network interface unit and receiving signals at the central office from the network interface unit. The TI span equipment includes a first pair of cables for... | 01/19/1999 |
| 5778048 | Feed imbalance detector in repeated line A feed imbalance detector in a repeated line for detecting a feed imbalance in a PCM repeated line and for displaying an alarm includes: a constant current feeder for transmitting an operating voltage to the repeated line; a virtual ground unit for detect... | 07/07/1998 |
| 5696809 | Advanced intelligent network based computer architecture for concurrent delivery of voice and text data using failure management system A system and method for concurrent delivery of voice and text data to a service agent including a failure management system using an advanced intelligent network based information distribution system is provided. The system includes a central office switc... | 12/09/1997 |
| 5642217 | Apparatus for repowering and monitoring serial links A computer system employs a repeater unit which repowers a serial channel link. The repeater unit also monitors and records non-idle usage and errors for both directions of the repeated serial link. Non-idle usage of the serial link is recorded as a numbe... | 06/24/1997 |
| 5459714 | Enhanced port activity monitor for an integrated multiport repeater A system is provided on an Integrated Multiport Repeater (IMR) to monitor the activity of the IMR when the repeater is in minimum mode. Through this system the serial output pin outputs status based upon inputs at two input pin the signal in and the clock... | 10/17/1995 |
| 5422929 | Telephone line repeater and method of testing same A telephone line repeater (28) includes a pattern decoder/recognizer (100) which recognizes, inter alia, an input interrogating signal transmitted on a telephone network (20). The interrogating signal includes an address field (302) having at least one su... | 06/06/1995 |
| 5109296 | Transmission line switching system A transmission line switching system for switching a transmission line in operation to another transmission line when a fault occurs in the transmission line during operation comprising: a transmission line in operation constituted by a plurality of termi... | 04/28/1992 |
| 4980887 | Digital communication apparatus and method A T1 digital carrier system having a transmitter, receiver and a plurality of intermediate repeater stages. Each remote repeater has a select switch for automatically selecting that the remote repeater be placed in loop-back mode should a combination of f... | 12/25/1990 |
| 4815101 | Step-by-step remote locating system for repeaters in a pcm link A step-by-step locating system for a digital bidirectional transmission link includes repeater pairs between a monitoring end equipment and a remote monitored end equipment. When a repeater pair is connected via a loop-back path to the monitoring end equi... | 03/21/1989 |
| 4768202 | Signalling method and device for bidirectional digital transmission link A method of transmitting signalling along a bidirectional digital transmission link consists in transmitting from an intermediate equipment of the link a signalling message in two parts. One is a characterizing part the form of which depends on the signal... | 08/30/1988 |
| 4745603 | Code sequence generator for a digital transmission line fault location system A digital transmission line fault location signal generator includes a maximal length linear feedback shift register having m stages for generating a first pseudorandom sequence of binary signals with a period 2m -1. The first pseudorandom sequ... | 05/17/1988 |
| 4742518 | Fault location system for a digital transmission line A fault location system includes a test code generator located at an end terminal for transmitting a test code sequence of signals onto a digital transmission line. A line regenerator located along the transmission line detects the test code sequence of s... | 05/03/1988 |
| 4738033 | Rapid change holder for probe pins A mount on the probe head of a coordinate measuring machine is described. For rapid change of a probe pin carrier, accommodating at least one probe pin, which is drawn against a bearing which clearly determines the position of the probe pin carrier in the... | 04/19/1988 |
| 4713810 | Diagnostic technique for determining fault locations within a digital transmission system An in-service line monitoring technique to detect and isolate marginal and failed digital transmission equipment within a digital telecommunication system having at least two end terminals. At selected terminal and repeater locations, a digital error dete... | 12/15/1987 |
| 4710924 | Local and remote bit error rate monitoring for early warning of fault location of digital transmission system In-service line monitoring apparatus to detect and isolate marginal and failed digital transmission equipment within a digital telecommunication system having at least two end terminals. At selected terminal and repeater locations, a digital error detecto... | 12/01/1987 |
| 4710976 | Optical repeater monitoring system An optical repeater for an optical digital transmission line has a pair of in-service monitoring circuits (55, 55') each of which includes a flip-flop (57) for dividing frequency of transmission data to derive commands and burst carrier in the first line ... | 12/01/1987 |
| 4658395 | Method for locating faults in a carrier subscriber communication system Method and apparatus is disclosed for identifying faults in a subscriber carrier telephone system utilizing out-of-band pilot signals and comprising pluralities of cables and repeaters that are alternately connected in series between carrier equipment at ... | 04/14/1987 |
| 4642426 | Apparatus for locating faults in a carrier subscriber communication system Method and apparatus is disclosed for identifying faults in a subscriber carrier telephone system utilizing out-of-band pilot signals and comprising pluralities of cables and repeaters that are alternately connected in series between carrier equipment at ... | 02/10/1987 |
| 4633459 | Repeater for carrier subscriber communication system Method and apparatus is disclosed for identifying faults in a subscriber carrier telephone system utilizing out-of-band pilot signals and comprising pluralities of cables and repeaters that are alternately connected in series between carrier equipment at ... | 12/30/1986 |
| 4630268 | Communication circuit loopback test apparatus To perform a loopback condition for testing purposes, the present apparatus supplies a null signal from an end terminal on a communication link through a set of repeater stations to reinitialize the repeater stations. It then sends N+1 pulses of a frequen... | 12/16/1986 |
| 4607376 | Digital radio relay system A radio relay system for a fully-digitalized transmission network is disclosed. In the system, a received auxiliary signal can be by-passed from receiver to transmitter via a switching circuit provided in the auxiliary unit when an additional auxiliary si... | 08/19/1986 |
| 4604745 | Method of searching fault locations in digital transmission line A method of searching fault locations which is employed in a transmission system comprising a transmitting terminal having a transmitter for transmitting a digital signal; a receiving terminal having a receiver for receiving the digital signal; a pluralit... | 08/05/1986 |
| 4406919 | Method and apparatus for monitoring intermediate regenerative repeaters A method and apparatus for monitoring remotely-fed intermediate regenerative repeaters, in which each intermediate regenerative repeater contains a digital signal regenerative repeater for the digital data signal transmitted and a telemetry signal regener... | 09/27/1983 |
| 4355215 | Remote control systems for telecommunications links A remote control system for a telecommunications link between two stations, one being a monitoring station and the other a monitored station, interconnected by an outward channel and a return channel, said channels having a plurality of signal regeneratin... | 10/19/1982 |
