Abstract: A cable management system having as an integral part of the device needing cable management a slot arrangement that receives and holds cables. A lock bar closes the slot arrangement such that the cables are trapped in the slot arrangement. Methods of managing cable include the lock bar and slot arrangement.

Abstract: A fiber optic connector including a ferrule, a hub including a front portion, a housing surrounding the hub and including an inner surface including a bore, the inner surface including a first engagement surface, and a spring positioned within the housing to bias the hub. A press ring includes an outer surface and an inner surface, the outer surface including a second engagement surface configured to engage the first engagement surface of the inner surface of the housing to prevent relative rotation, and the inner surface of the press ring configured to engage the hub so that the hub is maintained in rotational alignment while moving along the longitudinal axis of the connector. A tuning tool is configured to engage and rotate the hub and allow the press ring to slide along an outer diameter of the tuning tool to be delivered to the bore of the connector.

Abstract: An output of a first data register is coupled to an input of a second data register. The same periodic clock signal clocks both data registers. A controller monitors the clock signal, a first load signal and a read signal. The controller generates a guard band signal using the clock signal and the first load signal. The controller also generates a second guard band signal from the read signal and the clock signal. A second load signal, that is used to load the second data register, is created by performing a logical AND operation on the two guard band signals.

Abstract: An apparatus and method provide for filtering of voiceband and specified tone frequencies of a mixed voice/data signal, such as an Asymmetric Digital Subscriber Line (ADSL) signal. A lowpass filter section passes voiceband content of the mixed signal and suppresses mixed signal content having frequencies falling within a databand of the mixed signal. A bandpass filter section is coupled to or integral with the lowpass filter section and passes the specified tone frequency, such as a metering or billing tone frequency. The lowpass and bandpass filter sections exhibit a combined frequency response that provides for a stopband between the voiceband and the metering tone frequency. The bandpass filter section effectively detunes a frequency response of the lowpass filter section to provide for the stopband.

Abstract: A digital television transmitter for an ATSC or NTSC signal includes a digital vestigial sideband modulator having a digital sinusoidal source. A digital multiplier arrangement multiplies a digital signal including the information in the digital television signal by a sequence derived by the digital sinusoidal source to derive plural orthogonally phased digital product signals. A digital lowpass filter arrangement passes low frequency components of the plural digital product signals and rejects high frequency components of the plural digital product signals. A signal combiner arrangement combines a carrier with signals containing information passed by the lowpass filter arrangement necessary to derive a vestigial sideband signal. The combiner arrangement includes at least one digital to analog converter that in different embodiments derives a vestigial sideband signal that modulates an I.F. or R.F. carrier.

Abstract: A telecommunications apparatus for use with a plug having at least first, second and third pins. The telecommunications apparatus includes a plug connector for receiving the plug. The plug connector includes at least first, second and third electrical contacts for electrically contacting the first, second and third pins, respectively, when the plug is inserted in the plug connector.

Abstract: The present invention includes a method for clock recovery in a packet network. The method includes a network which receives data packets at a destination node. Then the data packets are stored in a buffer. The data packets are read out of the buffer by using a locally generated clock. The fill level of the buffer is monitored over a first period of time. A relative maximum fill level for the buffer is identified during the first period of time. Further, the relative maximum fill level is used to control the frequency of the locally generated clock so as to control the rate at which data is read out of the buffer.

Abstract: A method is disclosed for reinforcement of thin wall hollow thermoplastic storage vessels with one or more wraps of continuous fibers. This method requires thermal bonding between the reinforcement fibers and the outer surface of the thermoplastic storage vessel while the interior cavity of the storage vessel is being pressurized. The fiber wraps can also be oriented in spatial directions further resisting internal stress on the storage vessel walls when put in service.

Abstract: Multiple digital audio transformer circuits are included in a module for mounting in a chassis. These digital audio transformer circuits are comprised of a front mounted twisted pair digital audio cable connector and a rear mounted coaxial cable connector, with circuitry including baluns electrically linking the front and rear connectors to reduce the impedance of the signal and attenuate the amplitude of the signal voltage. In one embodiment, the module may also include removable attenuation pads accessible through the front face of the module to allow variation of the level of voltage attenuation. The preferred embodiment of the module bi-directional transforms 110 Ohm digital audio signals and 75 Ohm coaxial signals. If transformation of other levels of impedance are desired, modules may also allow for removal and replacement of the baluns. A digital audio transformer system including multi-circuit modules and rack mount equipment chassis is also provided.

Abstract: The present disclosure relates to a device for holding a plurality of fiber optic connectors. The device includes a clamp defining a plurality of ferrule receiving openings, a set plate with openings for the fibers, an alignment surface on which the ferrules rest, and an actuator for moving moveable portions of the clamp. The clamp has a plurality of moveable portions that at least partially define the ferrule receiving openings. The moveable portions are moveable between a rest, biased closed position in which the ferrules are clamped within the ferrule receiving openings, and an open position in which ferrules can be inserted in the ferrule receiving openings.

Abstract: Couplers for a cable trough system including a terminal end sized to receive a terminal end of a trough member along a longitudinal direction of the body. A spring may be coupled to the body for securing the terminal end of the trough member to the coupler, the spring including first and second spring arms extending generally in opposition to one another in a plane generally parallel to the longitudinal direction. The spring may be received in a slot formed by the trough member. Also included may be a spring release mechanism coupled to the body, the spring release mechanism sliding in the longitudinal direction between a locked position, such that the first and second spring arms engage the terminal end of the trough, and an unlocked position, such that the first and second fingers release the first and second arms of the spring.

Abstract: A telecommunications cable management system includes fanning trays and management panels, including slidable drawers, mounted to a rack for management of cables. The fanning tray includes fingers for managing vertical cables. The cables extend horizontally through the fanning tray. The fanning tray includes hinges to access the space or the rack behind the fanning tray. A lock holds the fanning tray in the pivoted up position. One drawer includes slack management devices including a radius limiter that selectively releases to release slack at desired times. A slidable termination panel can be mounted in another drawer to allow greater access to the panel. The fanning trays and drawers are mounted to a rack for managing and connecting the cables.

Abstract: A terminated coaxial connector having a mating end for mating with a coaxial jack, the connector including an axially aligned resistor mounted within a conductive outer shell. The resistor electrically links the outer shell with a center conductor which is connected to a first end of the resistor through a conductive rear plug which is connected to a second end of the resistor. The center conductor and the rear plug hold the resistor axially aligned within the outer shell. Further, a method of assembling a terminated coaxial connector having a mating end for mating with a coaxial jack so that a resistor within the connector is held axially aligned within an outer shell by a rear plug. The resistor is physically and electrically linked to the center conductor and the outer shell through the conductive rear plug and provides a level of impedance within the coaxial connector.

Abstract: A fiber optic circuit provides signal access and monitoring using a set of various switches. The various switches can be remotely controlled using a programmable controller. This controller implements a method for programming and controlling a fiber optic circuit. The fiber optic circuit includes a plurality of signal connection modules, a signal switching network, and a master controller module. The method receiving a circuit configuration command from a remote computing system, retrieving a connection table containing data entries used to specify how the signal connection modules and the signal switching network are to be configured, constructing a module configuration command for each data entry retrieved from the connection table and transmitting the module configuration command to the corresponding module to configure the fiber optic circuit.

Abstract: The present invention relates to bulkhead adapters for optically connecting two strands of optical fibers and including a length of optical fiber within the adapter for attenuating signals passing from one fiber to the other. The attenuation optical fiber is held within an attenuation hub inside the housing of the adapter. Attenuation of optical fiber signals transmitted through the adapter may be provided by the optical fiber, by an offset fusion of two optical fibers, by an airgap between two optical fiber segments, by the inclusion of a filter between two optical fiber segments, or by other structures. When an optical fiber with a connector is inserted into the adapter, the optical fiber is placed in optical contact with the attenuation optical fiber of the attenuation hub. The adapter can be inserted through an opening in a bulkhead so that optical fiber from one side of the bulkhead can be attached to optical fiber on the second side of the bulkhead.

Abstract: A method for testing a device of a cable modem system includes specifying a MAC address for the device under test, specifying one or more test messages for the devices under test, specifying a mode of failure for the messages, sending the messages to the device under test according to the failure mode and determining whether the device under test and other devices of the system respond correctly.

Abstract: An apparatus and method is described that allows for improved correlation of multiple signatures from an input datastream, reducing the complexity and memory size of the correlation operation by utilization of a multiple sequence indexing correlator. The multiple sequence indexing correlator keeps an index into each signature that indicates how many elements have been matched so that only the remaining portion of each signature must be compared to the input data stream. Because of this, no history of the input datastream is kept and only a small portion of each signature is compared at one time. Additionally, the multiple sequence indexing correlator allows for ease of signature modification or addition, pre-execution of functions, signatures with identical substrings but differing lengths to be detected, wild card signature elements, timeouts to determine signature end, null functions, execution hold off for extended signatures, and keystroke detection.

Abstract: A telecommunications equipment rack including vertical cable guides, horizontal troughs, cross aisle panels and cross-connection modules for telecommunications equipment racks. The vertical cable guides define vertical cable channels for both network infrastructure and cross-connection cables. The structure defining the second cable channel is hingedly attached to the structure defining the first cable channel. The horizontal cable troughs include both upper and lower troughs. The upper cable trough defines two cableways for directing cross-connection and other cables, and provides access openings for cables to pass into and out of each cableway and between the two cableways. The lower cable trough defines a cableway and provides access openings for cables extending into and out of the cableway. Cable troughs attached to adjacently mounted equipment racks cooperate to form continuous horizontal cableways.

Abstract: A fiber optic telecommunications bay is provided including modules each including a pivoting panel which selectively closes a portion of the module. Each module has first and second cable access locations. The first cable access location enters the module and allows termination of the cables at the pivoting panel. An opposite side of the pivoting panel allows cables to extend into a second area of the module for storage, and then exiting of the module at a second access location.

Abstract: Couplers for a cable trough system including a spacing defined by first and second guiding surfaces, the spacing being sized to receive the terminal end of a trough member into the spacing. One or more springs are carried on the couplers and may be at least partially disposed within the spacing between the first and the second guiding surfaces. The springs urge the terminal end of the trough member against the coupler upon insertion of the terminal end into the spacing. One or more locking elements are coupled adjacent to the springs to move between a locking position and a released position. The locking elements may slide longitudinally or move perpendicularly to the couplers. A first trough member may be released from the couplers independent from a second trough member coupled to the couplers. Methods for use of the couplers are also provided.