Patents Assigned to Lucent Technologies
  • Patent number: 6318824
    Abstract: A cabinet includes a hinged tracking system for attaching a door to the cabinet. The hinged tracking system allows the door to translate rectilinearly away from the cabinet, as well as rotate with respect to the cabinet. The hinged tracking system includes a track member attached to a side wall of the cabinet, and a slide member slidable with respect to the track member. An intermediate member may be disposed between the track member and the slide member to increase the linear travel of the slide member. A hinge is located between the slide member and the door. The track member and the slide member may include stoppers which prevent overtravel of the slide member with respect to the track member, so that the slide member does not inadvertently slide completely off of the track member. The slide member may also include a locking system for locking the slide member in a maximum extended position, and for locking the hinge in a closed position or an open position.
    Type: Grant
    Filed: October 29, 1998
    Date of Patent: November 20, 2001
    Assignee: Lucent Technologies, Inc.
    Inventors: Richard Thomas LaGrotta, Manuel G. Orellana
  • Patent number: 6320265
    Abstract: A semiconductor device includes a semiconductor layer, prelayer, refractory layer, and conductive layer. The conductive layer includes an ohmic contact layer, and may also include a barrier layer, of a highly stable, low-resistance element or compound, such as Au or Ti, which is formed on the refractory layer. The refractory layer is a material that does not react with, or dissociate from, either the prelayer or the conductive layer when the semiconductor device is exposed to relatively high temperatures. The refractory layer material may be metal suicides, phosphides, or nitrides. The material of the prelayer is selected to minimize strain between the prelayer, the refractory layer and the semiconductor layer to provide a relatively strong bond between the refractory layer and semiconductor. The prelayer may be selected to provide relatively high current injection to the semiconductor, and may further form a low Schottky barrier height with the semiconductor.
    Type: Grant
    Filed: April 12, 1999
    Date of Patent: November 20, 2001
    Assignee: Lucent Technologies Inc.
    Inventors: Utpal K. Chakrabarti, Gustav E. Derkits, Jr.
  • Patent number: 6320121
    Abstract: A removable RF shield cover that snap-fit attaches to RF shield fence walls without special tools or soldering. The RF shield cover engage the interior surface of the shield wall with a tensional force that holds the RF shield cover and provides for a continuous metal-to-metal seal to isolate electronic components to reduce RF emissions or protect against electo-magnetic interference. The snap-fit attachment enables the RF shield cover to be easily removed from the fence, without special tools, to access components within the RF shield enclosure.
    Type: Grant
    Filed: September 14, 1999
    Date of Patent: November 20, 2001
    Assignee: Lucent Technologies Inc.
    Inventors: Robert M. Honeycutt, Michael G. Kossor, Richard G. Witty
  • Patent number: 6320955
    Abstract: A method for identifying a route of a call in a telecommunication system (10) comprises the steps of routing the call from a telephonic calling device (12) via a telephonic switch (14) to a telephonic terminating device (56) and disconnecting the telephonic call. After the telephonic call is disconnected, a call trace is established to identify a called line number of a terminating line in response to a call trace request from the telephonic calling device (12) after the telephonic call is disconnected.
    Type: Grant
    Filed: March 1, 1999
    Date of Patent: November 20, 2001
    Assignee: Lucent Technologies, Inc.
    Inventor: William Jackson Bushnell
  • Patent number: 6321013
    Abstract: An optical module includes a stack of optical fiber ribbons that are within a buffer encasement, such as a thin sheath, that closely bounds the periphery of the stack. The optical modules can be rectangular, so that the optical modules can be readily stacked in a manner that results in a very space efficient fiber optic cable. The optical modules can be tested prior to being incorporated into the fiber optic cable so as to maximize the probability of the fiber optic cable being fully operable. The sheath cushions all of the sides of the stack. In some optical modules, the stack is movable relative to the sheath and the optical fiber ribbons are movable relative to one another.
    Type: Grant
    Filed: September 15, 1999
    Date of Patent: November 20, 2001
    Assignee: Lucent Technologies, Inc.
    Inventors: Nathan E. Hardwick, III, Kenneth Wade Jackson, Clyde Jefferson Lever, Richard Hartford Norris, Jim Jenqtsong Sheu, Richard Dalton Small, Jr., Carl Raymond Taylor, Peter A. Weimann
  • Patent number: 6318903
    Abstract: A plug type connector is adapted to be latched to a backplane wall in a fixed position and has a tapered front, nose or connector end for insertion into an adapter which plugs into the backplane wall. The adapter may be misaligned in any or all of the X, Y, Z axes. The tapered nose cams the X or Y misaligned adapter into axial alignment as the adapter and its mount are being inserted. A shortened front or connector end of the connector causes the ferrule of the connector to project beyond the optical plane of the connection so that it reaches a ferrule in a Z aligned adapter to complete the connection. A coil spring within the housing of the connector is tuned to allow counter movement of the ferrule where the ferrule in the adapter is too long, thereby shifting the position of the optical plane.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: November 20, 2001
    Assignee: Lucent Technologies Inc.
    Inventors: Scott R. Andrews, Elizabeth J. Driscoll, Norman Roger Lampert, Troy Barrett Mock, Gregory A. Sandels, Naif Taleb Subh
  • Patent number: 6321087
    Abstract: A method and apparatus for obtaining call record information in a mobile telecommunication switching system. The information is obtained, not only from the base station serving a call at the time that of the call record information is requested, but also for obtaining such information from prior base stations serving the call and subsequent base stations serving the call. Whenever a call is handed off, the identity of the call record and the handing-off base station, as well as the identity of the handing-off base station and the mobile switching center, (MSC), serving the call in the previous base station are recorded in the handed to base station. When a request for call record information is received, the base station serving the call transmits such call record information, and also transmits a request to the immediately prior base station to transmit its call record information from the identified call record. The predecessor then requests a similar action from its predecessor, if any.
    Type: Grant
    Filed: January 8, 1999
    Date of Patent: November 20, 2001
    Assignee: Lucent Technologies Inc.
    Inventor: Tuan Anh Do
  • Patent number: 6320300
    Abstract: Piezoelectric crystals are arranged to function as variable resonators. In one embodiment, three crystals are arranged as an array, with a center crystal between two outer crystals. An electrical excitation of the outer crystals causes a mechanical displacement in the crystals along a common axis. This displacement squeezes the center crystal, resulting in a shift of the crystal's resonant frequency. By this arrangement, signals input to the outer crystals vary the resonant properties of the inner crystal.
    Type: Grant
    Filed: September 3, 1998
    Date of Patent: November 20, 2001
    Assignee: Lucent Technologies Inc.
    Inventors: Walter J. Kaminski, Arild Kolsrud
  • Patent number: 6321344
    Abstract: A method and apparatus for implementing a highly reliable distributed processing system. The group of processors of the system are linked in a circular list, the final processor being linked to the first processor. Only one of the processors is a lead processor, and has the “Watchdog” data required of a lead processor. Only a lead processor can seize a global resource, and only a lead processor can switch another processor out of service. The successor processor to the lead processor contains a Ghost Object token, which is initially identical to the contents of the Watchdog token, except for an indication that it is a Ghost Object token. This next processor times from the time that it receives the Ghost Object token to insure that it will receive the Watchdog token within a pre-determined time. If it fails to receive the Watchdog token by the end of the time-out, it converts the Ghost Object token to a Watchdog token, and sends a new Ghost Object token to its own successor processor.
    Type: Grant
    Filed: December 10, 1998
    Date of Patent: November 20, 2001
    Assignee: Lucent Technologies Inc.
    Inventor: Gary Grant Fenchel
  • Patent number: 6320534
    Abstract: A location-based personal telephone routing system is responsive to a subscriber's location for routing incoming calls to a telephone near the subscriber. A program-controlled processor within the system interrogates a location determining device after receiving a call directed to the subscriber. The location determining device replies to the interrogation with a message including location information that the processor uses to dip into a database listing telephone numbers and corresponding locations of telephones specified by the subscriber. If no subscriber-listed telephones are near the location received, the system then dips into an area-wide database to compare the location received to the stored locations of a large number of telephones in a geographic area. Upon determining the telephone closest to the subscriber, the processor then routes the incoming call to the determined telephone and alerts the subscriber through distinctive ringing.
    Type: Grant
    Filed: August 24, 1999
    Date of Patent: November 20, 2001
    Assignee: Lucent Technologies Inc.
    Inventor: Stephen C. Goss
  • Patent number: 6321018
    Abstract: The combination of a tray and a cover for fiber optic cables, the tray is adapted to hold fiber optic cables and has upstanding side and rear walls, the upper edge of each wall having a ledge formed by a recessed channel in the edge. A cover is adapted to be applied to the tray and has a plurality of edges which nest within the tray so that its side and rear edges rest on the ledge of the tray. The tray has holes therein for receiving protrusion extending from the cover for frictional engagement. Openings are provided in the walls adjacent to the holes to provide access for a user to lift up the cover from the tray.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: November 20, 2001
    Assignee: Lucent Technologies, Inc.
    Inventor: Bassel Hage Daoud
  • Patent number: 6321271
    Abstract: A real-time method for routing subject to an acceptable delay constraint between nodes in high-speed data networks, such as PNNI protocol networks, uses an illustrative two-phase algorithm employing Dijkstra's algorithm at each phase. In an illustrative first phase, the Dijkstra SPF algorithm is used in seeking the shortest cumulative delay from the destination to the source, thereby generating cumulative delay labels from a node j to the destination node k. The delay results are then employed in the second phase, where the Dijkstra SPF algorithm is illustratively employed for determining administrative weight (AW) as the link metric subject to modification in accordance with results obtained in the first phase.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: November 20, 2001
    Assignee: Lucent Technologies Inc.
    Inventors: Muralidharan Sampath Kodialam, Wing Cheong Lau, Anlu Yan
  • Patent number: 6317543
    Abstract: A family of oil or fluid-based lubricants with an additive, for use in fabricating optical fiber cables having loose fibers or stacked optical fiber ribbons is disclosed. The additive, which can be either fumed silica, fumed alumina, or block polymers, lowers the surface tension and contact angle, and increases the viscosity and wettability of the lubricants.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: November 13, 2001
    Assignee: Lucent Technologies Inc.
    Inventor: Jim J. Sheu
  • Patent number: 6317821
    Abstract: A pipelined processor is configured to provide virtual single-cycle instruction execution using a register locking mechanism in conjunction with instruction stalling based on lock status. In an illustrative embodiment, a set of register locks is maintained in the form of a stored bit vector in which each bit indicates the current lock status of a corresponding register. A decode unit receives an instruction fetched from memory, and decodes the instruction to determine its source and destination registers. The instruction is stalled for at least one processor cycle if either its source register or destination register is already locked by another instruction. The stall continues until the source and destination registers of the instruction are both unlocked, i.e., no longer in use by other instructions.
    Type: Grant
    Filed: May 18, 1998
    Date of Patent: November 13, 2001
    Assignee: Lucent Technologies Inc.
    Inventors: Dean Batten, Paul Gerard D'Arcy, C. John Glossner, Sanjay Jinturkar, Jesse Thilo
  • Patent number: 6315597
    Abstract: A power connector for receipt and releasable engagement with a wire to effect a transmitting power electrical connection to the wire. The power connector includes a connector housing having a wire insertion side with an opening for receiving the wire. A spring contact is disposed within the housing and includes an attachment end for attaching the spring contact to the connector housing and a contact end for contact with the wire. The spring contact includes a substantially C-shaped segment extending between the attachment end and contact end. The C-shaped segment is dimensioned to be maintained under compression and so that the spring contact applies a contact force against an inserted wire at the contact end with a force sufficient for supporting the conducting of electricity between the wire and contact end.
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: November 13, 2001
    Assignee: Lucent Technologies Inc.
    Inventors: James Christopher Coyne, James T. LaGrotta, Richard Thomas LaGrotta
  • Patent number: 6317833
    Abstract: In an improved election process, a voter constructs his or her vote message (potentially padded with a random string) and encrypts it. The voter then signs the encrypted vote and posts the signed, encrypted, vote on a bulletin board. After the voting booths have closed, a set of talliers decrypt the encrypted votes with the aid of the mix network, to obtain the final tally, but without revealing or being able to notice the relationship between votes cast and votes in the tally.
    Type: Grant
    Filed: November 23, 1998
    Date of Patent: November 13, 2001
    Assignee: Lucent Technologies, Inc.
    Inventor: Bjorn Markus Jakobsson
  • Patent number: 6317874
    Abstract: A unique cache structure with some addressing flexibility and a unique linker method that generates program code with a minimized WCET and takes advantage of the flexibility of the cache structure is provided. The method generates relocatable object modules for each function of the program code. Suitable starting locations for theses objects modules are generated and linked together forming an executable version of the program code. WCET analysis is performed on the executable code. The WCET is then compared to the previous best WCET estimate. The starting locations of the modules providing the better WCET are stored as the best configuration for the program code. The process may be repeated until the WCET is suitably minimized. The unique cache structure allows the WCET minimized program code to reside contiguously in memory, while being properly cached according to the results of the linker method.
    Type: Grant
    Filed: December 4, 1998
    Date of Patent: November 13, 2001
    Assignee: Lucent Technologies, Inc.
    Inventor: G. N. Srinivasa Prasanna
  • Patent number: 6317499
    Abstract: The present invention is an apparatus for generating random bits from a computer system. The apparatus comprises a rotating storage device operating within the computer system. A rotational latency of the rotating storage device is associated with the computer system accessing information from the storage device with the rotational latency causing the accessing of the information to have an entropy. An extraction mechanism extracts random bits derived from entropy of the rotational latency of the storage device.
    Type: Grant
    Filed: August 3, 1998
    Date of Patent: November 13, 2001
    Assignee: Lucent Technologies Inc.
    Inventors: Bruce Kenneth Hillyer, Bjorn Markus Jakobsson, Elizabeth Shriver
  • Patent number: 6317549
    Abstract: A optical fiber is disclosed that is suitable for use in a dispersion-compensated, optical communication system that is served by Erbium-doped fiber amplifiers. The fiber has a negative chromatic dispersion that is more negative than −0.8 ps/(nm-km) over the wavelength region 1530-1565 nm. and has a dispersion slope that is less than 0.05 ps/(nm2-km). This fiber exhibits an average optical transmission loss that is less than 0.21 dB/km; and its effective area exceeds 50 &mgr;m2, which renders it relatively insensitive to bending loss. The optical fiber includes a core of germanium-doped silica whose refractive index is n1, and a layer of cladding material that surrounds the core. The cladding comprises approximately pure silica, whose refractive index is n2. Between the core and the cladding, the fiber further includes first and second annular rings of doped silica. The first annular ring has a width of 4.5±1.5 microns, is doped with fluorine, and has a refractive index n3.
    Type: Grant
    Filed: May 24, 1999
    Date of Patent: November 13, 2001
    Assignee: Lucent Technologies Inc.
    Inventor: Charles S. Brown
  • Patent number: 6317255
    Abstract: Automatic reduction of optical signal power supplied by an upstream network element by a prescribed amount is achieved by capturing and processing reflected optical energy that is generated within the optical fiber path as a result of a downstream fiber cut, open connector, or other potentially hazardous discontinuity. Generally, the power level of the reflected optical signal is detected and measured in the optical fiber path and the optical signal power supplied by the upstream network element is automatically reduced. The optical signal power may either be reduced by an amount corresponding to the measured reflected optical signal power or may be completely shut off until the faulty condition is resolved.
    Type: Grant
    Filed: April 28, 1998
    Date of Patent: November 13, 2001
    Assignee: Lucent Technologies Inc.
    Inventors: Mohammad Taghi Fatehi, Bruce Lee Nelson, Kamal Kumar Raychaudhuri