Abstract: A monitoring circuit is provided. The monitoring circuit can be used to monitor signals in a cable network. The monitoring circuit includes first and second stages. The first stage has an input and an output. The input is coupled to an external circuit. The first stage scales a voltage received at its input. The second stage is coupled to the output of the first stage. The second stage has a high input impedance and a low output impedance. The second stage buffers a signal at the output of the first stage to an output of the second stage.

Abstract: The present disclosure relates to a rack for mounting telecommunications equipment for receiving cross-connect modules and cables. The rack includes a frame defining a bay formed between two spaced-apart, vertical end walls. The bay is sized for receiving telecommunications equipment. The rack also includes cable management structure connected to the frame. The cable management structure includes first and second front vertical cable channels. Rear cable supports extend rearwardly from the rack. The vertical channels include two nested channels wherein the two vertical channels face each other. A top of the rack includes two nested channels. A base of the rack includes a first plate, and two transversely extending second plates, and a gusset between the transversely extending plates and the vertical channels.

Abstract: Fiberoptic connector and adapter assembly includes a fiberoptic connector received within an adapter. The connector has a cover on the connector housing. The cover pivots between open and closed positions to expose or cover, respectively, a optical fiber contained within the connector. Longitudinal guides of the connector are received cooperating with longitudinal guides of the adapter to direct the connector into the adapter in a prescribed alignment. A cam pin is carried on the adapter to engage a cam pin receiving slot on the cover to urge the cover to the open position as the connector is inserted into the adapter.

Abstract: A plastic, one-piece adapter for a printed circuit board (PCB) holds the PCB within a recessed area by means of a series of fixed, overhanging tabs and a series of snap latches, all of which are integrally molded as part of the one-piece adapter.

Abstract: A method and apparatus are disclosed for distributing power in a media converter system. The method involves converting an input voltage to an intermediate voltage and transmitting the intermediate voltage to a downstream converter. The downstream converter converts the intermediate voltage to a usable output voltage that is supplied to the media converter ports. The apparatus includes a main power supply for creating the intermediate voltage and downstream converters located remotely from the main power supply for converting the intermediate voltage to the usable output voltage. Transmission cables are also included for providing the intermediate voltage to the downstream converters. The apparatus may also include a bus with connections for the power supply and a power distribution module. The power supply and power distribution module utilize identical connections thereby providing flexibility in positioning the power supply and distribution module in a chassis.

Abstract: A data storage system receives multiple data streams, such as a telephone messages, each of which are to be stored in a multidisk array. The data storage system generates a disk write request for each data stream. The disk write request is allocated to a disk in the multidisk array that has the highest weighted available space. The weighted available space of each disk is determined by the space availability of the disk and the load on the disk relative to other disks in the multidisk array. Optionally, the method used to allocate the disk space availability is dependent upon the disk write request load level. Thus, if the request load level is in a first load range, a least full assignment method is used, if the request load level is in a second range, a round robin method is used and if the request level is in a third range the weighted available space method is used.

Abstract: Techniques for etching a wafer layer using multiple layers of the same photoresistant material and structures formed using such techniques are provided. In a method, first, multiple layers of the same photoresist material are formed over the wafer layer to form a composite photoresist layer. The composite photoresist layer is patterned and developed to form a patterned photoresist layer. Exposed portions of the wafer layer are then removed using the pattern photoresist layer. Each of the multiple layers of photoresist may, for example, be formed to a maximum rated thickness for the photoresist material. Structures formed using this process may have relatively small dimensions (e.g., widths of 5 microns or less or a spacing or pitch of 5 microns or less). In addition, structures may also have sidewalls which are relatively long, smooth, and/or vertical.

Abstract: The present disclosure relates to relates to a telecommunications outlet box including a peripheral wall that is primarily curved except for a portion in which a connector access opening of the box is defined. The present disclosure also relates to a telecommunications outlet box having a cradle in which a cable management spool is retained. The present disclosure further relates to a cable guide for use with a telecommunications outlet box. The cable guide projects outward from a connector access opening of the outlet box and provides a protective shield around cables connected to the outlet box.

Abstract: A system for routing short messages between message centers provides that messages are first checked to see if they are to be handled by the local message center, and then routed, if appropriate, to another message center using point code or global title translation routing.

Abstract: A fiber optic module includes front adapters for connection to fiber optic connectors, and rear adapters for connection to fiber optic connectors. The module includes two circuits having passive optical couplers inside, and adapters exposed along the front and the rear of the module. The module is usable in cross-connect applications with itself or with other modules. The adapters are selectively connectable to fiber optic connectors. The front adapters of the module include two receive input ports and two transmit output ports. The front of the module also includes two visual indicators, one for each circuit. The visual indicators include a lens cap at least partially transparent to visual light in light communication with an optical fiber. The rear adapters of the module include two transmit input ports and two transmit output ports. Monitor ports are also located on the rear for both the transmit and receive signals.

Abstract: A monitor circuit for indicating whether a digital cross-connect bay has a cross-connect jack that cross connects equipment being tested that includes a non-intrusive sensor for sensing current changes in a power feed line of the bay being monitored. The non-intrusive sensor is operatively coupled to a sensor device that generates a signal to activate an external sensor if a current change is detected by the sensor. The sensor device is powered from the same power supply as the bay it is monitoring.

Abstract: Fiberoptic connector and adapter assembly includes a fiberoptic connector received within an adapter. The connector has a cover on the connector housing. The cover pivots between open and closed positions to expose or cover, respectively, a optical fiber contained within the connector. Longitudinal guides of the connector are received cooperating with longitudinal guides of the adapter to direct the connector into the adapter in a prescribed alignment. A cam pin is carried on the adapter to engage a cam pin receiving slot o the cover to urge the cover to the open position as the connector is inserted into the adapter.

Abstract: Circuits and methods are described which reduce waiting time jitter at a synchronizer/multiplexer by using a “sub-bit” comparison of a clock associated with an unsynchronized data stream and a clock associated with a synchronized data stream to generate a threshold level for use in determining when to stuff bits into the synchronized data stream. The term “sub-bit” means that the phase difference, as measured by, for example, the location of pointers associated with the two clocks, is precise to a fraction of a bit.

Abstract: A multi-point to point communication system. The system includes a distribution network between a head end terminal and a plurality of remote units, the head end terminal for downstream transmission of downstream control data and downstream telephony information in a first frequency bandwidth over the distribution network and for receipt of upstream telephony information and upstream control data in a second frequency bandwidth over the distribution network. The head end terminal including a head end multicarrier modem means for modulating at least downstream telephony information on a plurality of orthogonal carriers in a plurality of regions of the first frequency bandwidth and for demodulating at least upstream telephony information modulated on a plurality of orthogonal carriers of a plurality of regions in the second frequency bandwidth.

Abstract: An automatic gain control circuit for an analog to digital converter is provided. The automatic gain control circuit includes an input, coupled to an output of the analog to digital converter, to receive samples output by the analog to digital converter. The automatic gain control circuit also includes a digital to analog converter that is coupled to selectively adjust a magnitude of an input signal for the analog to digital converter. The automatic gain control circuit also includes a microcontroller. The microcontroller is coupled to the input and the digital to analog converter. The microcontroller is programmed to generate a feedback signal for the digital to analog converter to control the amplitude of the input to the analog to digital converter.

Abstract: A module for radio frequency signal circuits includes an electrically conductive housing. Coax connectors are secured to the rear face of the housing. A circuit board is contained within the interior spaced between sidewalls of the housing. A ground side of the circuit board includes a layer of electrically conductive material which is electrically connected to the housing. Coax cables extend within the interior of the housing from the coax connectors and between the ground side of the circuit board and an opposing sidewall. An opposite side of the circuit board contains circuit components interconnected with one another through a plurality of circuit paths.