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| Number | Title | Issue Date |
| 6526021 | Clear channel 1:N SONET transport system and method A SONET format signal transport system and method providing an increased transport capacity. The transport system includes multiple low speed transport systems wherein each low speed transport system can have a pair of low speed terminals connected by N w... | 02/25/2003 |
| 6498322 | Portable heating tent and method for testing telecommunications equipment A portable heating tent (10) and method are disclosed for testing telecommunications equipment (16). The portable heating tent (100 includes a tent assembly (12) that provides a housing sized to contain telecommunications equipment (16) for testing. The h... | 12/24/2002 |
| 6313442 | Portable heating tent and method for testing telecommunications equipment A portable heating tent (10) and method are disclosed for testing telecommunications equipment (16). The portable heating tent (100 includes a tent assembly (12) that provides a housing sized to contain telecommunications equipment (16) for testing. The h... | 11/06/2001 |
| 5924018 | Analog microwave communication system having a microwave hop converted to a new operating frequency and method A converted analog radio (71) is disclosed for converting an analog microwave hop (70) to a new operating frequency. The converted analog radio (71) comprises an analog radio (72) operable to communicate microwave signals at a first frequency, a digital r... | 07/13/1999 |
| 5913066 | Electronic work environment for a data processing system An electronic work environment for a data processing system includes documentation modules which execute on the hardware elements of the system. The documentation modules exchange data between the software elements and hardware elements of the data proces... | 06/15/1999 |
| 5903372 | Means for remote addition of video services to subscribers The present invention details an apparatus for distribution of video and telephony services on a single twisted wire pair to each of a plurality of subscribers, comprising an optical network unit (ONU) connected by means of an optical fiber to a remote te... | 05/11/1999 |
| 5872780 | Sonet data transfer protocol between facility interfaces and cross-connect An internal signal within a SONET element has a transport format having overhead and payload mapped in a manner similar to the Synchronous Optical Network standard mapping, except having selected overhead bytes defined differently, including a byte used f... | 02/16/1999 |
| 5844908 | Digital delay system and method for digital cross connect telecommunication systems A system and method for provides a generating a plurality of clock phases from a clock signal in a telecommunications cross connect system. The digital delay circuit includes a plurality of delay elements connected in series, each delay element connected ... | 12/01/1998 |
| 5809032 | Time division multiplexed synchronous state machine having state memory A receive SONET line interface includes an elastic store which receives and stores incoming signals from a pointer tracking circuit and retrieves stored signals for providing to a pointer generating circuit wherein, for both the pointer tracking and point... | 09/15/1998 |
| 5790614 | Synchronized clock using a non-pullable reference oscillator Digital signal processing techniques are used to synthesize a range of output frequencies locked to a non-pullable reference oscillator, and the synthesized output frequency is used in a slave low bandwidth phase-locked loop; by increasing digital resolut... | 08/04/1998 |
| 5778447 | System and method for fast memory access using speculative access in a bus architecture system A data processing system including dynamic random access memory (DRAM) in a bus architecture is disclosed. A controller is included in the system which unconditionally generates the row address strobe (RAS--) and column address strobe (CAS... | 07/07/1998 |
| 5754607 | Method and apparatus for achieving fast phase settling in a phase locked loop A method and an apparatus are provided to achieve fast phase settling when a reference signal for a phase locked loop changes from a first frequency to a second frequency, such as during holdover recovery in a synchronous optical network. The present meth... | 05/19/1998 |
| 5751943 | Electronic work environment for a data processing system An electronic work environment for a data processing system includes documentation modules which execute on the hardware elements of the system. The documentation modules exchange data between the software elements and hardware elements of the data proces... | 05/12/1998 |
| 5740157 | Distributed control methodology and mechanism for implementing automatic protection switching Redundant facility payload signals (12, 14) received by redundant interface modules (16, 18) are redundantly provided (28, 30; 32, 34) to redundant downstream modules (24, 26) in an equipment (10). A non-symmetrical facility protection algorithm is reside... | 04/14/1998 |
| 5726355 | Apparatus for detecting a change in volumetric integrity of an enclosure An apparatus for detecting a change in the volumetric integrity of the interior of an enclosure. The enclosure has an electrical interface for coupling to a circuit board and an access device for accessing said interior of said enclosure. The apparatus in... | 03/10/1998 |
| 5721424 | Avalanche photodiode apparatus biased with a modulating power signal An photodetector circuit comprising an avalanche photodiode having a signal input for receiving an input optical signal to be converted to an electrical signal. The photodetector circuit further includes biasing circuitry, coupled to the avalanche photodi... | 02/24/1998 |
| 5717907 | Method and apparatus for generating a reset pulse responsive to a threshold voltage and to a system clock A reset pulse generating circuit is disclosed for generating reset pulses that are used for placing digital systems such as microprocessors into a known state upon power-up and when power fluctuations occur. The reset pulse generating circuit includes a m... | 02/10/1998 |
| 5717693 | Sonet payload pointer processing and architecture A SONET network element receives incoming SONET signals with a receive line interface (2) which stores the incoming data in an elastic store at the recovered line rate while a local interface reads the stored data at the local network element rate, which ... | 02/10/1998 |
| 5715248 | Derivation of VT group clock from SONET STS-1 payload clock and VT group bus definition A SONET formatter circuit (10) receives a parallel STS-1** TX signal (19) from a highspeed interface module. The STS-1** TX signal (19), which contains a floating VT group payload, is demultiplexed into seven parallel VT groups (33). These seven parallel ... | 02/03/1998 |
| 5710650 | Dispersion-reducing multiple wavelength division multiplexing optical fiber transceiver and methods for using and assembling same A dispersion tolerant OC-192 optical transceiver includes the circuitry for implementing the method of reducing optical signal dispersion in a high data rate data stream that travels on an optical fiber communications system. The circuitry includes circui... | 01/20/1998 |
| 5708687 | Synchronized clock using a non-pullable reference oscillator Digital signal processing techniques are used to synthesize a range of output frequencies locked to a non-pullable reference oscillator, and the synthesized output frequency is used in a slave low bandwidth phase-locked loop; by increasing digital resolut... | 01/13/1998 |
| 5706299 | Sonet tributary ambiguity resolution for elastic store control Read and write addresses on the local and line sides of a SONET elastic store are compared at least twice in order to determine any ambiguity in the comparison and, if so determined, foregoing any pointer adjustments that would otherwise have been made.... | 01/06/1998 |
| 5689608 | Fiber optic assembly A method of increasing the attachment bond strength between a first and second object comprising respective first and second materials is disclosed. Each of the first and second materials has a respective first coefficient of thermal expansion at an assem... | 11/18/1997 |
| 5689530 | Data recovery circuit with large retime margin A circuit for recovering a clock signal from incoming data and for retiming the incoming data comprises circuitry for generating a plurality of phased clock signals responsive to a selected frequency and clock recovery circuitry for generating a recovered... | 11/18/1997 |
| 5687014 | Optical distribution shelf for a remote terminal of an optical fiber telecommunications network In an optical fiber telecommunications network for providing both narrowband telephony signals and broadband video services over a single optical fiber using a single optical carrier, an optical distribution shelf includes a plurality of optical distribut... | 11/11/1997 |
| 5666547 | Method and apparatus for framing a serial data stream A method and apparatus for identifying at least a portion of a framing pattern in a data stream comprising a plurality of sequential bits. In the method embodiment, the method includes the step of identifying a set of successive candidate bits wherein the... | 09/09/1997 |
| 5648984 | Multidirectional repeater for data transmission between electrically isolated and/or physically different signal transmission media In a signal transmission network, such as a data network, having a multiple access bus topology (12) in which many nodes reside and communicate over the same bus, and wherein electrically isolated and/or physically different signal transmission media (17,... | 07/15/1997 |
| 5640512 | Maintenance method and apparatus for providing a high-integrity, unidirectional, standardized ATM/SONET/DS3 transport signal link for a video distribution network A high-integrity video distribution signal is provided unidirectionally from one network node to another network node according to a standard digital communications format (ATM; SONET; DS3) that defines digital signal communications in a bidirectional man... | 06/17/1997 |
| 5638410 | Method and system for aligning the phase of high speed clocks in telecommunications systems A method and system are provided for detecting and measuring a phase difference, linearly over a range of 360°, between the output signals from a primary stratum clock module (100) and a standby stratum clock module (120) in a telecommunications system, ... | 06/10/1997 |
| 5633892 | Hybrid line coding method and apparatus using 4B/3T encoding for payload bits and 1B/1T encoding for framing information Existing infrastructures such as DS1 or E1 are used at currently accepted rates to carry a third more information by using a hybrid encoding technique wherein a 4B3T encoding is done for the payload bits, while a 1B1T encoding technique is used for framin... | 05/27/1997 |
| 5630270 | Circuit board identification method A circuit board having at least one operational characteristic. The circuit board includes a surface and a plurality of conductive pads accessible from the surface and for electrically coupling electrical components to one another. Further, the circuit bo... | 05/20/1997 |
| 5627837 | Apparatus and method for suppressing protection switching in a digital communication system in the event of an error burst A method and system for performing protection switching in a communications system is disclosed. The disclosed system and method include the ability to detect bit error burst conditions, in which data is highly errored over a brief time and responsive to ... | 05/06/1997 |
| 5612862 | Method and circuitry for controlling current reset characteristics of a magnetic amplifier control circuit Magnetic amplifier post regulator (54) includes magnetic amplifier (42) that has a main magnetic amplifier winding, reset transistor (76), error amplifier (58), and auxiliary magnetic amplifier winding (220). Magnetic amplifier (42) controllably blocks a ... | 03/18/1997 |
| 5612980 | Method and apparatus for fast lock time A system and method for fast frequency locking are provided in which the phase difference between first and second synchronization signals is measured (22). The frequency difference between the two signals is then determined (24). The frequency of the sec... | 03/18/1997 |
| 5602880 | Method and system for minimizing resynchronization delays in digital microwave radio systems A method and system is provided for minimizing resynchronization delays in a digital microwave radio system by, immediately upon detecting a signal degradation such as a loss of signal or an out-of-specification signal at any one of a series of digital mi... | 02/11/1997 |
| 5596804 | Method of constructing an electromagnetically shielded microstrip circuit A method of constructing a circuit for communicating electrical signals and assembled at least in part by an automated assembly machine is disclosed. The automated assembly machine is operable to select from a plurality of components. The circuit includes... | 01/28/1997 |
| 5598493 | Method and system for forming an optical fiber microlens A method and system for forming microlens (78) on an optical fiber (60) include optical fiber lensing device (10) having lowering mechanism (18) for inserting optical fiber (60) at a predetermined and controlled speed to a predetermined depth in oil-acid ... | 01/28/1997 |
| 5596614 | Method and circuitry for aligning the phase of high-speed clocks in telecommunications systems A method and circuitry are provided for detecting and measuring a phase difference between the output signals from a primary stratum clock and a standby stratum clock in a telecommunications system, computing a period of time needed for a numerically-cont... | 01/21/1997 |
| 5594576 | Optical serial bus interface In an optical fiber transmission network, a remote terminal fed by a high-rate optical signal includes an internal electrical link called a serial interface bus carrying 24 DS0 channels. The optical transmission network is extended by converting the SBI b... | 01/14/1997 |
| 5592519 | Dual frequency clock recovery using common multitap line A circuit for recovering a clock signal from incoming data and for retiming the incoming data comprises circuitry for generating a plurality of phased clock signals responsive to a selected frequency and clock recovery circuitry for generating a recovered... | 01/07/1997 |
