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Raynet Corporation Patents
Assignee:
Raynet Corporation
Address:
Menlo Park, CA
No. of patents:
32
Patents:












Patent Number Title Of Patent Date Issued
5539805 Power supply system including ringing voltage reset under low input voltage conditions July 23, 1996
A voltage detection circuit, in conjunction with a power supply system for ringing voltage generation in a remote telecommunications unit, monitors the operating voltage level of the remote unit and, when an undervoltage condition is detected, causes a ringing reference-signal generator
5412498 Multi-RC time constant receiver May 2, 1995
A protocol for fiber-optic communication systems, or other communication systems based on transmission of unipolar pulses having wide dynamic range provides for information to be transmitted in packets having a predictable time slot for each transmitter. The receiver for such protocol ha
5402479 Method and apparatus for translating signaling information March 28, 1995
An office interface unit (OIU) transfers data and signaling between a telephone local exchange and distribution lines. Information from the telephone local exchange is contained in repetitive frames containing signaling time slots which each contain two distinct nibbles of informatio
5396575 Sealed optical fiber closures March 7, 1995
An assembly capable of enclosing and sealing an intermediate section of an optical fiber includes a plurality of sealing mechanisms arranged such that the assembly can be entered to gain access to electronic components for servicing without affecting an environment occupied by optical fi
5321710 Predistortion method and apparatus for laser linearization June 14, 1994
A predistortion circuit reduces composite second order intermodulation distortion products inherently generated by a laser diode. A radio frequency signal is split into a primary and secondary signal, and the secondary signal is amplified by an amplifier biased at a starvation curren
5321596 DC/DC/AC power supply for a subscriber interphase unit June 14, 1994
A DC to DC switch mode power supply for a service subscriber interface unit of a fiber optic network includes a source of DC primary power, a main DC to DC switched mode power supply connected to the source of DC primary power and including switching circuitry and rectifier circuitry for
5319656 Thermal control for laser diode used in outside plant communications terminal June 7, 1994
A method and apparatus implementing the method are provided for controlling optical power output level of a laser diode modulated during a burst mode interval by digital data transitions within a shared logical bus optical communications network and over a predetermined thermal gradient.
5315489 Pressure clamp for telecommunications closure May 24, 1994
A telecommunications closure (1) includes a pressure clamp (21) for sealingly clamping mating parts (47, 48) of the closure together so as to form a water tight seal. The clamp member requires no tools during installation and creates no uncertainty as to the generation of appropriate
5282195 DSO cross-connect for floating virtual tributaries January 25, 1994
A method and apparatus for cross-connecting arbitrary fragments of an incoming virtual tributary synchronous payload envelope, or arbitrary fragments of any incoming transmission stream, at a cross-connect element within a communications network is provided without incurring a delay
5261024 Card cage used for coupling to telecommunications media November 9, 1993
A card cage for housing a plurality of circuit boards and passive optical fiber couplers contains a tray for storing express optical fibers or express optical fiber tubes not to be coupled within the card cage but rather expressly routed through a distribution point accommodating the
5208893 Optical fiber splice tray and splice holder May 4, 1993
An optical fiber splice tube holder includes a plurality of torsion bars and cantilever bars which provide a resilient retaining force for an optical fiber splice container to be retained therein. The use of torsion bars helps distribute stress generated by a spring force of the fiber
5208693 Transmission protocol for clamping receiver May 4, 1993
A protocol for fiber-optic communication systems, or other communication systems based on transmission of unipolar pulses having wide dynamic range provides for information to be transmitted in packets having a predictable time slot for each transmitter. The receiver for such protocol ha
5202553 Enhanced performance optical receiver having means for switching between high and low amplifier April 13, 1993
A transimpedance front end is provided for an optical receiver which includes a photodetector coupled optically to an optical fiber for receiving optical signals over the fiber and connected electrically to the front end. The front end comprises a buffer amplifier connected to the ph
5196712 Printed circuit board apparatus with optical switching March 23, 1993
A printed circuit board apparatus includes a handle which has an extension plate which extends into an optical switch so as to prevent communication between an optical emitter and optical receiver. To remove the printed circuit board apparatus from its associated rack housing, rotation o
5193132 Method of coupling light via a coupler on a fiber optic light guide using phase space matching March 9, 1993
A coupler for a fiber optic light waveguide has phase space matching optics to increase coupling efficiency. The acceptance phase space of the fiber optic waveguide has two components for light in two orthogonal planes. One of the phase space plots has a straight spine and the other has
5189671 Apparatus and method for formatting variable length data packets for a transmission network February 23, 1993
A transmit control store is provided for assembling recurrent data packets of information for transmission over an optical fiber communications network from a host digital terminal to a variable number of optical network units, wherein each optical network unit serves a variable number
5142401 Apparatus and method for a linear, wideband sensitive optical receiver August 25, 1992
An optical receiver includes a photodetecting device and a wide band video amplifier. The photodetecting device and the video amplifier are coupled by reactive elements which are selected to provide a highly linear and highly sensitive response over a frequency range of approximately 400
5126870 Linear broadband signal generator using primary and secondary optical modulators June 30, 1992
A linear optical broadband signal generator includes primary and secondary optical modulators whose outputs are combined so as to minimize intermodulation distortion of a modulated optical signal. A constant amplitude optical signal is split differentially so as to create primary and
5090792 Optical fiber tap handling tray February 25, 1992
An optical fiber waveguide tap handling tray is provided for use with a cable containing a plurality of optical fiber waveguides which are separated from the cable and exposed in a section thereof. The tap handling tray comprises a frame, a clamp for clamping the cable to the frame a
5069516 Telecommunications closures December 3, 1991
An optical fiber enclosure for a pedestal environment includes a pedestal which slideably supports a closure within the pedestal along a vertical direction so that during freeze-thaw envionrmental conditions when the pedestal is raised and lowered by expanding and contracting earth the
5066139 Coupler verification test circuit November 19, 1991
A coupler verification test circuit includes first and second circuits one of which is disposed at a head end of an optical fiber network and the other of which is disposed at a subscriber interface unit to be attached to the network when the head end is not operational. The subscriber
5036189 Thermal control for laser diode used in outside plant communications terminal July 30, 1991
A method and apparatus implementing the method are provided for controlling optical power output level of a laser diode modulated during a burst mode interval by digital data transitions within a shared logical bus optical communications network and over a predetermined thermal gradient.
5016969 Mechanism for nesting an optical fiber in an optical coupler and providing positive stop opening May 21, 1991
An optical coupler for coupling light between an optical fiber core and an electrooptic transducer includes a pin and channel arrangement associated with a mechanism for opening and closing the coupler. At one position the pin engages an end of the channel whereat the coupler is open and
5016962 Method of repairing an optical fiber May 21, 1991
A method of providing optical signal transmission past an optical fiber section in need of repair includes withdrawing an optical signal from the fiber upstream of the section and injecting the signal into the fiber downstream of the section in a passive manner while the section is being
5013118 Filtering high order modes of short wavelength signals propagating in long wavelength single mod May 7, 1991
An optical fiber network includes a single mode silica core/cladding optical fiber having a cutoff wavelength in the range of about 1000-1200 nanometers, and a plurality of optical couplers serially disposed on the optical fiber so as to form a bus network, with each optical coupler
5010293 Inrush current limiting circuit April 23, 1991
An inrush current limiting circuit in accordance with the principles of the present invention limits initial current flow to a highly initially reactive power load. The current limiting circuit comprises a plug in connection to a power source and two conductor paths leading from the plug
4978194 Stepped cable block December 18, 1990
A cable block for telecommunications cable includes first and second half shell members which together form a substantially cylindrical stepped longitudinal bore therethrough, portions of the bore being sealingly engaged against progressive stripped outer parts of a stripped part of the
4959846 Clock recovery apparatus including a clock frequency adjuster September 25, 1990
A digital phase acquisition circuit includes circuits for detecting an edge of incoming data and a plurality of candidate clock phases, the circuitry further including logic for determining when the data undergoes a predetermined phase transition and at least one candidate phase which
4924473 Laser diode protection circuit May 8, 1990
A laser diode protection circuit includes an input connected to receive the RF amplitude modulating signal. A second RF amplifier is connected to amplify the received RF amplitude modulating signal and to put out an amplified signal. A sensing element such as differential amplifier or
4902327 Monitoring fiber bend loss characteristics during manufacture February 20, 1990
Forming an optical fiber so as to have a relatively constant bend loss characteristic includes apparatus for continuously bending the optical fiber downstream from a preform from which it is drawn and continuously detecting light withdrawn from the fiber at the bend so created to det
4887880 Optical fiber connector structure December 19, 1989
An optical fiber tap for connecting polymer optical fibers is achieved by heating an end section of the fibers to be connected and deforming the end sections into a non-circular cross-sectional shape so as to form a throughput cross-sectional area and a add/drop throughput area, the
4815817 D-shaped fiber March 28, 1989
A D-shaped fiber which has an evanescent-field which is easily tapable has a low attenuation since a buffer material disposed on a cladding planar side of the waveguide has an index of refraction lower than the cladding so as to effectively increase a radius of the cladding in the vicini

 
 
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