Abstract: A low cost differential voltage limiter circuit provides a feedback to regulate a voltage output of a voltage source. In one embodiment, the limiter circuit includes a transistor coupled to outputs of first and second voltage sources. If a differential voltage between the two sources exceeds a predetermined threshold, the output voltage of the higher source is reduced. In one embodiment, a PNP transistor is used to regulate the high voltage source.

Abstract: Resistance in parallel with inductors in a series leg of the low-pass filter facilitates changing input and output resistance of the filter with little or no change in the reactance of the inductors. Furthermore, the reactance of the capacitors in the shunt legs of the filter will be substantially unaffected. This assists the designer in matching the impedance of the filter in the pass-band while still providing substantial impedance mismatching in the stop-band without substantially affecting the characteristics of the filter. Facilitating impedance matching in the pass-band and impedance mismatching in the stop-band is accomplished without the need for more complex active components. POTS splitters making use of such filters can facilitate impedance matching of line and load termination in a telecommunications system in response to signals within the frequencies of typical analog telephony service while providing impedance mismatching in response to signals within the frequencies of typical xDSL service.

Abstract: A semiconductor ridge laser with a tapered ridge is disclosed. The tapered ridge is designed to provide for both gain-medium amplification and mode conversion amplification, the latter resulting in a higher kink power than is obtainable with gain medium amplification alone. The power and lateral mode content of the output beam is determined by the ridge parameters, which include length, width, number of sections and degree and type of taper for the tapered sections. The output beam can be made to have a profile that is more compatible with the lateral modes on an optical fiber than a conventional highly astigmatic output beam by including power in the higher-order lateral modes as well as in the fundamental lateral mode.

Abstract: Cascade low-pass filters are useful in attenuating the xDSL band in a POTS splitter. The design of the low-pass filter is a sixth-order filter having two stages. A first stage includes a fourth-order filter, preferably with a stop-band frequency of approximately 48 kHz. A second stage includes a second-order filter in cascade with the fourth-order filter. For this filter, the stop-band frequency is preferably approximately 29 kHz. The inductance value of the second stage is relatively small in comparison to the inductance values of the first stage. In this manner, improvements in xDSL band attenuation are facilitated with little or no eroding of the voice band performance such as insertion loss, pass-band attenuation and return loss.

Abstract: An element management system (“EMS”) interfaces between a telephone company computer or a terminal for use by a telephone company system administrator or customer service representative, and a telephone network element such as a central office or a group of central offices. In order to store and process subscriber data during the time periods when a telephone computer system is busy controlling telephone switching functions and therefore giving low priority to such data, the EMS contains a proxy database and maintains it between the periods when access to the telephone computer system is desired and available, without detrimentally involving the telephone computer system, the telephone switching network or any elements thereof. The EMS is capable of operating as the sole repository of subscriber data in a telephone computer system configured to operate in such an environment.

Abstract: A flexible cable guide member and assembly, the assembly including first and second cable guide members each having a curved wall with open ends. The curved walls define first and second cable pathways respectively for receiving a telecommunications cable. A first end of the first guide member defines a socket. A second end of the second guide member is rounded to be received by the socket of the first guide member to produce a ball-and-socket joint between the first and second guide members. The second guide member is snap-fit into the socket of the first cable guide member. The guide members define longitudinal slots to allow cables to be added or removed from the assembly. The first and second guide members are preferably identical.

Abstract: The present invention relates to a center conductor insulator with a tapered entry for use with a coaxial cable transmission line connector that provides guiding and centering of a center conductor pin within the connector. The present invention further relates to a front sleeve assembly for use with a coaxial cable transmission line connector which incorporates a center conductor insulator with a tapered entry to guide and center a center conductor pin within the connector. The present invention also relates to a compression ring assembly for mounting a connector to a cable, the assembly having a collet engaging a tapered rear seal to compress the collet about the cable. The present invention further relates to a method of mounting a connector to a cable with a compression ring assembly incorporating a collet and tapered rear seal.

Abstract: The present disclosure relates to a digital cross-connect device having a jack assembly including first and second jacks mounted in a jack receiving region of the digital cross-connect device. The jacks each include a column of ports. Each column of ports includes an in-port, an out-port, a monitor-in-port and a monitor-out-port. The in, out, monitor-in and monitor-out ports of the first jack are vertically staggered relative to the in, out, monitor-in and monitor-out ports of the second jack.

Abstract: A jack module system is disclosed. The system includes a housing (12) defining an interior. The system also includes first and second jacks (14, 14′). Each jack (14, 14′) includes a jack body (100) including upper and lower edges. Receiving means are disposed within the housing (12) for slidably receiving the jack bodies (100) in a first direction and slidably removing the jack bodies (100) in a direction opposite the first direction. The jacks (14, 14′) are stacked along an axis perpendicular to the first transverse dimension. The system also includes a cover (102) removably securing the jack bodies (100).

Abstract: Cable modem termination systems (CMTS) having directional couplers in the primary signal path facilitate redundancy without the need for active components, e.g., switches or amplifiers, in the primary signal path. The use of directional couplers in the primary signal path allows a backup CMTS transceiver to provide redundancy to multiple primary CMTS transceivers through the use of switching outside of the primary signal path. Additional directional couplers in the backup signal path may be used to allow testing and maintenance of the backup CMTS transceiver without disturbing the primary signal path.

Abstract: A telecommunications network is provided. The network uses a ring of ring switches to provide a transport mechanism for data packets that is transparent to the data and protocols contained in the data packets. This transport mechanism is simple and low cost to implement. Such networks can carry, for example, control data between a primary site and secondary sites of a cable network to set up and deliver pay per view, video on demand or near video on demand programming. The network can also be used, in other embodiments, to provide remote access to utility meters, to centralize network management of the cable network, and other appropriate monitoring and control functions.

Abstract: Electronic equipment includes a frame having a wall and connectors attached to the wall of the frame. A main board has a connection edge at which it is provided with connectors for engaging the connectors that are attached to the wall of the frame when the main board is advanced relative to the frame along a connection axis. An edge connector receptacle is attached to the wall of the frame and defines a slot perpendicular to the connection axis and to the connection edge of the main board. An auxiliary board is attached to the main board and is oriented perpendicular to the main board and parallel to the connection axis. The auxiliary board has a connection edge perpendicular to the connection edge of the main board and positioned to enter the slot of the edge connector receptacle concurrently with engagement of the connectors at the connection edge of the main board with the connectors attached to the wall of the frame.

Abstract: A system and method for protection switching in a transmission network is described. A protection switching mechanism comprises a multiplexer, a transmission path for each output of the multiplexer and a remote circuit. The multiplexer has an input coupled to receive an input signal and a plurality of outputs to output a plurality of output signals. Each transmission path is coupled to receive an associated output signal from the multiplexer. The transmission paths further include one or more redundant transmission paths, wherein signals directed to a faulty transmission path are redirected to an associated redundant transmission path. The remote circuit is used to selectively switch a redundant transmission path for a faulty transmission path at a subscriber.

Abstract: A patch panel including a plurality of electrical connector assemblies, wherein each of the electrical connector assemblies comprises a first jack presented on a first side of a panel frame of the patch panel and a second jack electrically linked to the first jack to form a jack pair and presented on a second side of the panel frame. Both the first jack and the second jack are presented at an angle with respect to the panel frame, and both the first jack and the second jack may be engaged using a patch cord. The first and second jack of each jack pair are at a 90-degree angle relative to one another.

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: An embodiment of the present invention provides a faceplate for a circuit board. The faceplate has first and second prongs protruding from a first end of the faceplate respectively at first and second sides of the faceplate. The first and second prongs are adapted to engage a housing to aid in inserting the circuit board into the housing. A tab protrudes from the first end of the faceplate at a front of the faceplate. The tab lies substantially between the first and second prongs. The tab is adapted to engage the housing to aid in extracting the circuit board from the housing.

Abstract: A fiber optic device is used by fiber optic systems that operate with light at more than one wavelength. The device may be inserted anywhere within the fiber network. The fiber optic device permits the separation of the wavelengths so that an optical device can operate on that separated wavelength without operating on the other wavelength or wavelengths. The different wavelengths may then be recombined. In another embodiment, different wavelengths may be combined into a single fiber, with an optical device being disposed to operate on one of the wavelengths.

Abstract: A systems operation module for a telecommunications system gathers all system change event code into one central location, and performs a series of checks and configuration modifications centrally. When the changes have been validated and the system updated, the systems operation module writes a new configuration to the system information database.

Abstract: A communications device apparatus and method is detailed that allows for improved system statistics gathering of network communication links, dataports, and system status. The improved communications device apparatus and method utilizes a relative time reference or clock for the determination of the starting and ending of system statistics gathering time periods. Thus allowing for the contiguous gathering of system statistics without errors or gaps caused by time changes made to an absolute time reference.

Abstract: A grating-based MUX/DMUX reduces temporal distortion. In one embodiment, and optical device that has a multi-channel port and a plurality of single-channel ports. At least one of the multi-channel port and the single-channel ports include a waveguide with a cross-sectional dimension that is smaller at an internal portion of the waveguide than at an aperture of the waveguide. An optical system has wavelength-dependent, free-space paths that couple light between the single-channel ports and the multi-channel ports. The waveguide aperture is coupled to one of the wavelength-dependent, free-space paths.