Abstract: A communication system is provided which draws virtually no loop current during a ringing burst and only draws on-hook loop current during the caller ID field. More particularly, ringer burst circuitry may be powered from the user powered circuitry by the transmission of power across the isolation barrier rather than being powered from the phone line. Thus, loop current need not be drawn from the TIP/RING lines during ringer bursts. The isolation barrier may be a capacitive isolation barrier which allows bidirectional communication and extraction of power from signals transmitted across the barrier.

Abstract: An in-line power tap device that can be deployed in a data communication network in which two ports of the in-line power tap device are interchangeably coupled between any two communicating nodes to pass in-line power and data signals. The in-line power tap device also has a pair of tap ports that are coupled to external analyzers to monitor the quality of data signals without interrupting the on-going communication between the two communicating nodes. The apparatus allows one to tap into an Ethernet unshielded twisted pair data transmission line, or other source of data transmission, without disturbing the in-line power transmission and to maintain the integrity of data transmitted.

Abstract: A method of handling telephone signals supplied by an analog telephone set and data supplied by a data terminal in a subscriber line circuit of a digital telephone switching system used at least in subregions for data transmission includes directly connecting a telephone set and a data terminal with a modem to the digital telephone switching system through a common analog subscriber line, at least one of subjecting data supplied by the data terminal to a sampling operation at a sampling rate above a sampling rate required for telephone information during analog/digital conversion and coding sampling values representing data supplied by the data terminal according to a linear characteristic during analog/digital conversion, and feeding data originating from and handled by the data terminal directly to a data transmission network. A subscriber line circuit for handling telephone signals supplied by an analog telephone set and data supplied by a data terminal is also provided.

Abstract: A cordless telephone-to-sound card interface adapter provides a connection between any standard cordless telephone system and a sound card of a computer for PC-to-PC or PC-to-telephone voice communications over the Internet. The interface adapter includes a hybrid transformer circuit for interfacing a two-wire circuit of the cordless telephone and a four-wire circuit of the computer sound card. This hybrid transformer circuit cancels out the voice echo that would otherwise exist due to mismatched impedances between the two media and/or from leakage of the signal being transmitted and received on the same pair of telephone lines. A Universal Serial Bus (USB) plug may be provided to receive a bias voltage from the PC for biasing circuits of the cordless telephone system through the interface adapter. Advantageously, the preferred interface adapter utilizes 100% passive components for a low-cost yet effective means to provide mobility for an end user during voice communications over the Internet.

Abstract: A method for optimizing the transmission properties and power loss of a high voltage part integrated in a subscriber line circuit for connecting a subscriber line wherein, during XDSL data transmission in the high voltage part, current sources which are integrated in the high voltage part and which supply current to the units present in the high voltage part for the purpose of amplifying or measuring telephone signals and/or data signals (which are situated above the frequency band provided for speech), are set, no later than when such data signals are received in the high voltage part, to current values which are higher than the current values for exclusive transmission of telephone signals situated within the voice band provided for speech, such that the data signals within the high voltage part are transmitted with a high bandwidth largely without distortions and the power loss of the high voltage part is optimized.

Abstract: A telecommunication equipment device in the form of a wall rack assembly used to accommodate a plurality of network interface units and used to interconnect a plurality of service lines of the network service provider with the customer's lines to serve as a demarcation point for legal tariff issues. The wall assembly includes a shelf assembly having at least two customer interface module connectors, each capable of receiving a detachable customer interface module, thus allowing flexibility in mounting in difficult to access areas, such as a corner of a room, closet, etc. In furtherance of the space saving and flexible mounting advantages, the wall assembly further includes a cover which can be installed and removed by lifting straight out away from the shelf assembly.

Abstract: Circuits provide power to network-based devices, such as IP telephones, using spare conductors within existing LAN cables. The circuits, which may comprise diode bridges, are designed to provide power using existing and planned industry guidelines.

Abstract: The present invention discloses a method and apparatus for reducing the power required by an integrated services hub supporting a plurality of telephone circuits, comprising offsetting ringing of each of the plurality of telephone circuits such that all the telephone circuits do not ring simultaneously. The step of offsetting ringing of each of the plurality of telephone circuits preferably further comprises providing each telephone circuit with a ring cadence comprising a ringing interval and a non-ringing interval and defining a starting point for the ringing interval within each telephone circuit's ring cadence such that the starting point for the ringing interval for at least one telephone circuit falls substantially outside the ringing intervals of the remaining telephone circuits.

Abstract: A programmable access point (110) has a line driver (201), sensors (202), comparator and control logic (203), a power supply (206), and a backup power supply (207). The line driver (201) provides power and communications signals to attached customer equipment and receives its power from either the power supply (206) or the backup power supply (207). The power supplies (206, 207) generate power supply status signals which include a signal indicating whether line driver (201) is receiving power from the power supply (206) or the backup power supply (207) and a signal indicating the reserve capacity of the backup power supply (207). The sensors (202) monitor the power output by the line driver (201). The comparator and control logic (203) receives the power supply status signals and the monitored power output values and generates a control value for line driver (201) which it provides to the line driver (201) which modifies its output responsive to the control value.

Abstract: Vehicles such as airliners or trains can be equipped with a form of local area network in which individual network connections are made to individual passenger seats using standard telephony connectors. Passengers having computers can connect to the network using their own conventional telephone cables. Wireless communications technology is used to link the vehicle network to external ground stations or satellite systems. To meet the DC power requirements of mobile computer users, the vehicle includes a DC power source. A normally unused wire-pair in the telephony connectors brings the DC power to each seatback. A slightly modified connector is used to transfer the DC power to the computer's DC power subsystem.

Abstract: A splitter card including a circuit board on which line, data and voice connectors are mounted. The connectors include contacts electrically connected to termination posts that extend through the circuit board such that ends of the termination posts are exposed. A plurality of splitters are connected to the circuit board for splitting composite signals into voice and data signals. The circuit board includes conductive paths for directing composite signals from the line connector to the splitters, for directing voice signals from the splitters to the voice connectors, and for directing data signals from the splitters to the data connectors. Dielectric insulator members are connected to the circuit board to cover the exposed ends of the termination posts.

Abstract: A subscriber line interface circuit apparatus includes a signal processor having sense inputs for sensed tip and ring signals of a subscriber loop. The signal processor generates linefeed driver control signals in response to the sensed signals. The signal processor resides on an integrated circuit die. In another embodiment, a subscriber line interface circuit apparatus includes a signal processor generating subscriber loop control signals in response to sensed tip and ring signals from the subscriber loop. A linefeed driver portion drives the subscriber loop in accordance with the subscriber loop control signals. The linefeed driver portion provides the sensed tip and ring signals. Each of the linefeed driver portion and the signal processor resides on an integrated circuit die. In one packaging implementation, the signal processor and the linefeed driver portion reside on separate integrated circuit die within separate integrated circuit packages.

Abstract: An RJ 11 port is disclosed that detects the device to which it is connected and automatically reconfigures itself as end user equipment or network interface equipment.

Abstract: A network termination (NT) which is universally applicable and permits fair billing. The network termination (NT) according to the invention is characterized in that it comprises a switching facility (DET, 1, 2, 3) whereby the interface (a/b, U) on the network side is switchable from an analog one (a/b) to a digital one (U). A subscriber who needs a digital interface, for example because he wants to have two B channels of the ISDN at his free disposal, can release a digital interface (U) or have it released. A subscriber who wants only an analog access can release an analog access or have it released. To accomplish this, the network termination (NT) contains a switch (3) and a detector (DET). The switching between analog access and digital access on the network side can be effected without replacement of the network termination (NT).

Abstract: A method provides seamless porting of a user telephone number from a first telephone service provider network to a second telephone service provider network. A network interface device is provided that is interconnected to the first telephone service provider network, a second telephone service provider network, and at least one user communications device. The network interface device may be remotely controlled using the second telephone service provider network to transfer the user telephone number from the first network to the second network.

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 dynamically adjustable digital gyrator device for a telephone line interface (e.g., a DAA) utilizing extended feedback and a dynamically adjustable filter to achieve stable convergence in the control of DC line current on a telephone line a short period of time. The low pass filter of the digital gyrator includes at least two (2) different fast filter settings and at least two (2) different slow filter settings based on possible load terminations (e.g., PBX, TAS, etc.), which can be determined based on the dynamic detection of an oscillation on the line. For instance, in a disclosed example, a voice band modem system is allowed to go off-hook with a 1 Hz cutoff low pass filter, and then the output of the low pass filter is checked for an oscillation. If an oscillation is detected, then the poles and/or zeroes of the low pass filter cutoff are changed to a slower convergence rate cutoff frequency (e.g., to 0.1 Hz). As a result, the exemplary voice band modem will converge stably and quickly (e.g.

Abstract: The invention relates to an SLIC circuit (1), which is connected directly to a telephone line (2), for joint transmission of voice and data via the telephone line (2), with adequate echo attenuation achieved even at high data frequencies in that a first current which corresponds to the sum of the transmission and received currents (Ia, Ib), and a second current (Id) which corresponds to the current produced by the transmission power level (Vtx) at the data frequency, are produced, and the difference between the first current and the second current (Id) is emitted.

Abstract: An apparatus and method for the efficient mapping of connectivity of telecommunications circuits where large numbers of such circuits are terminated at one end in concentrated bulk terminations. The apparatus regenerates multiple speech signals in a bulk termination adapter identifying both the bulk connector and the individual circuits terminating in the connector. A selectable group identity code allows many such units to be employed simultaneously to effect efficient mapping of hundreds of telecommunications circuits in one step even if concentration points occur in disparate locations. Speech reproduction is accomplished through a serial bit stream where the ratio of one bits to zero bits, varying with time, re-establishes a voice frequency signal with the aid of a simple filter circuit.

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 apparatus for receiving a voice signal and data, and a controlling method thereof, by which a voice telephone call can be made even in power failure, network error, or CPU error, comprises: a splitter for dividing data transmitted from a data transmission unit into an internet protocol data packet and a voice signal; a first telephone connected to an analog POTS channel of the splitter for receiving the voice signal divided in the splitter; and an integrated access device (IAD) for connecting a second telephone to a voice line, that is, the analog POTS channel of the splitter or connecting the second telephone to a data line of the splitter according to state of power failure.

Abstract: A remote power feeding method allowing efficient remote power feeding into a network termination device in the event of a commercial power failure at a subscriber site is disclosed. When the commercial power failure occurs, a power failure signal is transmitted from the subscriber-side network termination device to the central office-side line termination device. The central office-side line termination device, when receiving the power failure signal, starts DC power feeding to the subscriber-side network termination device via the subscriber line. During the power failure, only voice communication is permitted using previously selected good channels.

Abstract: A terminating device for interconnecting service provider wiring with subscriber wiring includes a base, a customer bridge, a removable cover and insulation displacement contacts for terminating the service provider wiring and the subscriber wiring. The insulation displacement contacts for the subscriber wiring are housed within the customer bridge and terminate the subscriber wiring by moving an actuating arm from a disconnected position to a connected position. The insulation displacement contacts for the service provider wiring terminate the service provider wiring by moving a stuffer from a disconnected position to a connected position. The cover includes a locking slide having a movable clasp for deterring unauthorized access to the customer bridge, while permitting authorized access. A plug on the cover and a jack on the base each have a resilient seal that telescope together to effectively seal test contacts located within the jack when the plug is inserted into the jack.

Abstract: A network interface device (NID) for connecting a telecommunications line to a subscriber premises. The NID includes an enclosure that houses wiring, connectors, and active telecommunications devices. A cooling device, such as a fan, is used for cooling the active devices within the NID and is powered by a storage capacitor. The capacitor is charged by current from telecommunications signals on the telecommunications line using a power regulating circuit. The active devices within the NID generate heat, and the cooling device maintains a desired operating temperature within the NID. In one embodiment, the NID includes electronic components used for providing DSL service to the subscriber, and the lower frequency voice components of the telecommunications signals received at the NID are used for charging the capacitor. A microserver within the NID senses the current levels provided to the NID and to an active component module (e.g., DSL modem), and senses the electrical charge level at the storage capacitor.

Abstract: An arrangement for implementing a network in an ISDN-based customer premises having a four-wire ISDN S0 bus. The ISDN-based customer premises includes a Network Termination Basic Access (NTBA) that interfaces between the residential customer premises and the public switched telephone network by mapping the two-wire ISDN signal onto the four-wire bus. A low pass filter is added to the two-wire send path to eliminate high frequency noise caused by harmonic reflections of the ISDN-based signals on the four-wire bus. Filters are also coupled between each ISDN device and the four-wire S0 bus, ensuring that the four-wire S0 bus is isolated from capacitive influences of the ISDN devices to optimize transmission of the higher frequency home network signals.

Abstract: A cost-effective filter consuming low power and occupying minimal space. The filter may be used in a ADSL modem (or CPE) to filter the signal components other than the ADSL signals. A high pass filter first filters the low frequency components to attenuate (or remove) lower frequency components such as that caused by ADSL transmit echo signals and that used for voice transmission. The high pass filter may be modified by adding a few resistors to limit the voltages of the high frequency signals also. The output of the high pass filter is amplified and passed through a low pass filter to filter the high frequency components (HPNA included). Due to earlier filtering operation of the high pass filter, the signal can be amplified substantially before being sent to the low pass filter. The implementation of the low pass filter is simplified due to the prior amplification.

Abstract: Telecommunications systems are provided which include telecommunications equipment, multi-pair connectors and cables, and management devices for grooming the conductors of the connectors and cables for efficient use of the conductor pairs between equipment. A further management device provides cross-connect fields for the conductor pairs of the system. A chassis may house the grooming device, any cross-connect device, and possibly a POTS splitter device. The grooming and cross-connects may be manually controlled, or electronically controlled, including locally or remotely.

Abstract: A digital subscriber line and POTS voice interface between a telephone line and central office equipment is provided. For POTS band frequencies, a reactive impedance coupled across the two wire interface of the POTS line card, and serially coupled to the line side of the DSL coupling transformer, has an open state magnitude. The magnitude of the line side windings of the DSL coupling transformer is low at POTS band frequencies. POTS band signal power is therefore delivered to the POTS line card. For DSL band frequencies, the reactive impedance across the POTS line card has a closed state magnitude. The POTS line card is therefore essentially short-circuited at DSL band frequencies, and DSL band signal power is delivered to the DSL modem. The frequency band in which the reactive impedance transitions from an open state magnitude to a closed state magnitude corresponds to the frequency band between the POTS frequency band and the DSL frequency band.

Abstract: A NID includes a base having a network area and a customer area adjacent thereto. The NID may also include a cable reel carried by the base. An access cover may be provided for the cable reel and the base that may include a network cover door for the network area, and a customer cover door for the customer area. The access cover may have a shape defined by at least a portion of an ellipsoid. The shape of the access cover may be defined by half an ellipsoid with major and minor axes adjacent the base, and the base may have an elliptical shape. The cable reel may be rotatable with the base or rotatable independent thereof.

Abstract: A digital direct access arrangement (DAA) circuitry may be used to terminate the telephone connections at the user's end to provide a communication path for signals to and from the phone lines. Briefly described, a means for providing a proper hookswitch transition for a variety of international phone standards is provided. The invention may also be utilized with means for transmitting and receiving a signal across a capacitive isolation barrier. More particularly, a DAA circuitry may be utilized which satisfies many or all hookswitch transition standards without the use of additional discrete devices. The hookswitch transition standards may be satisfied by ramping down the current flowing through the hookswitch prior to transitioning the hookswitch state. In this manner the hookswitch current change as a function of time (di/dt) may be decreased. Thus, the current through the hookswitch may be actively controlled prior to switching the hookswitch from an off-hook condition to an on-hook condition.

Abstract: An apparatus and method for interfacing a communication device, such as a Customer Premise Equipment (CPE) to different telephone networks. The telephone networks typically provide a voltage of 48 volts to the CPE. However, this DC voltage tends to fluctuate. Furthermore,the impedances of the telephone network varies. The apparatus provides a constant current to the communication device while coupled to different telephone networks. Since most communication devices use amplitude modulations for transmitting data, a constant DC biasing current is desired. The apparatus can sense load impedances of the telephone networks, and dynamically adjust the current source so that DC biasing currents remain relatively constant. The apparatus is coupled to the telephone network so that communication between the communication device and the telephone network is optimized.

Abstract: A common package serves as, for example, a common network interface package for a switching system. Since the common package is usable for various purposes, its cost is reduced and the cost of maintenance and management of the switching system is reduced. The common package is a printed board package (35) installed in an apparatus and used for a variety of purposes. The common package includes a programmable device (36), memories (45 to 48) for storing programs to configure the programmable device, a selector (41) for selecting one of the programs from the memory so that the selected program may so configure the programmable device as to make the common package serve as a specific circuit, and an instruction unit (51) for issuing an instruction to specify the program to be selected by the selector.

Abstract: A telecommunications device including a plurality of splitter cards mounted in a chassis, a circuit board, and plurality of card edge connectors for providing electrical connections between the splitter cards and the circuit board, and POTS, LINE, and DATA connectors. The circuit board includes three layers, each layer having tracings that electrically connect at least one POTS, LINE, or DATA connector to at least one of the card edge connector. A center layer includes a grounding plane that is adapted to reduce cross-talk between tracings on a top layer and tracings on a bottom layer. The grounding plane is co-planar with tracings on the center layer such that the grounding plane adds additional thickness to the center layer.

Abstract: A telecommunications device including a chassis having a card housing for containing a plurality of splitter cards. The card housing includes front and back ends. The front end of the card housing defines an access opening for allowing the splitter cards to be inserted into or removed from the card housing. The device also includes a plurality of card edge connectors for providing electrical connections with the splitter cards. The card edge connectors are located within the card housing adjacent to the back end of the housing. Each card edge connector is arranged in a generally horizontal orientation. The device further includes forwardly facing LINE, POTS and DATA connectors that are electrically connected to the card edge connectors. At least the LINE and POTS connectors are positioned in a generally horizontal orientation.

Abstract: In at least one embodiment, a current mode differential active hybrid circuit having an H-bridge output driver with a first output resistor coupled across a transmission medium output. Drive circuitry is coupled to the output H-bridge and constructed to supply data modulated signals to the output H-bridge. A second H-bridge is coupled to the drive circuitry in parallel with the output H-bridge to allow a second output across a second output resistor.

Abstract: A front access splitter assembly that fully supports lifeline POTS and lifeline ISDN (Integrated Services Digital Network) service requirements is shown and described in this disclosure.

Abstract: A filter arrangement, for shaping a signal transmitted over POTS wiring, includes an input to receive a signal. The filter arrangement includes a signal path from the input to an output that is coupled to POTS wiring. The transmit path includes a high-pass filter, a low-pass filter, and a trap filter coupled between the high and the low-pass filter. The trap filter operationally introduces a filter zero at a resonant frequency of the high-pass filter.

Abstract: An auxiliary connection mechanism for allowing a Digital Switching System (DSS) to share an analog line with an analog device (via an auxiliary device port) is disclosed. The auxiliary connection mechanism includes a pair of relays for releasably connecting the auxiliary device port and the DSS to the analog line. When the analog line is idle, both the analog device and the DSS are connected to the line in order to receive incoming calls on the analog line. However, once one of the devices (either the analog device or the DSS) uses the line, the other device should not access the line. A busy line detect circuit is included to detect whether a device is using the line.

Abstract: An architecture for stacking DSLAMs employs a master DSLAM having a control circuit and an uplink communication circuit to a central office and two LVDS circuits for communication with two DSLAM boxes in adjacent circuit interconnection to the master DSLAM. Multiple slave DSLAMs each having a programmable control circuit and two LVDS circuits for communication with two DSLAM boxes immediately adjacent on either side in the circuit are connected in a ring or split stack arrangement. A control circuit in the master selectively programs the control circuits in each slave DSLAM to control the direction of communication in the LVDS circuits as round robin in a first selected mode and a split in a second selected mode to accommodate the desired structure.

Abstract: A system for cross-connecting network elements of different types through a common universal media. In the system, a media conversion interface is electrically connected to a network element. This media conversion interface passively maps the connector and cable type of the network element to a universal connector type. This media conversion interface is electrically connected to a cross-connect module in a universal distribution frame. This electrical connection uses a universal cable group and universal connectors. This cross-connect module is connected to another cross-connect module, also in a universal distribution frame, using a universal cable group and universal connectors. This second cross-connect module is electrically connected to a second media conversion interface, using a universal cable group and universal connectors.

Abstract: A high bandwidth telephone line transceiver for connecting telecommunications equipment to a telephone line provides a pair of isolation capacitors connected to the telephone line to transmit the telephone signals across the requisite electrical isolation barrier. The capacitors are connected to a user-side hybrid circuit that provides a line impedance match for the telephone circuit, and converts the two wire connection to the capacitors to a 4 wire circuit for separate transmit and receive signal paths. The receive signal path extends through a signal op amp to a high pass filter that transmits the DSL download bandwidth and rejects the upload bandwidth and voice spectrum. The received signal is then fed to an analog/digital converter, and the digitized signal is connected to a DSP. The DSP is connected to a data handling device via a USB port, a PCI interface, or the like. The transmit signal path extends from the DSP circuit to a transmit path digital/analog converter.

Abstract: A replaceable plug which provides voltage surge protector redundancy for use in a maintenance termination unit connecting a telephone company line to a subscriber telephone line. The plug includes connecting terminals for connecting input and output telephone lines to a switch within the plug, and a pair of surge protector circuits. The switch is wired so that it selectively connects one or another of two surge protectors between the input and output lines replacing an actuated protector with a back up protector and restoring telephone service to the subscriber. Associated with this device is a method of determining whether a telephone line fault is due to a protector actuation or in the line proper, and for restoring telephone service without having to send a service person to the location of the maintenance termination box, by providing surge protector redundancy and a switching arrangement whereby a protector is replaced in the line circuit by a switching action.

Abstract: A telephone line interface circuit with event detection capabilities is provided that screens out transient signals and provides an indication to the line side that an actual event has occurred; so that appropriate discrimination circuitry is powered up to determine the exact nature of the actual event only when needed. An event detector develops an AC signal that represents the events to be detected. This AC signal is timed to determine its sustained rate. The sustained rate has a timing threshold which is higher than a transient that occurs on the line. If the incoming signal does not meet the required threshold timing, it is disregarded as being transient and no action is taken. If the incoming signal meets the threshold requirement, the line interface circuit switches to the full power mode and facilitates the actual data transmission.

Abstract: A method and system for selecting a frequency for communication within a premises network are disclosed that offer significant operational advantages. According to one aspect of the present invention, a system for selecting a frequency for communication within a premises network may include a telephone line interface, a transceiver, and a logic/control unit coupled to both the telephone line interface and the transceiver. The telephone line interface may be operable to couple to a premises network. In some embodiments, the logic/control unit may be operable to select a first channel. The first channel may correspond to a first frequency over which communications may be sent from the transceiver to other devices within the premises network.

Abstract: The present invention provides an improved communications interface device for existing interface devices, capable of providing improved and enhanced functional features to the traditional limited services of telephone-based and communications interface devices without requiring modification to physical characteristics of existing interface devices. The apparatus includes a module having electrical connectors for establishing electrical connection to one or more service provider cables and one or more subscriber cables and a replaceable motherboard and one or more replaceable daugbterboards capable of providing access to additional bandwidth, sharing of bandwidth, access to high-speed and multimedia data, distribution of data by residential gateways and/or across existing telephone wiring, access to cable-related data, analog to digital conversion of data, or power surge damage-protection.

Abstract: A telephone network interface device that provides at least two drop-wire connection ports and two distribution cable ports. One drop wire port provides full bandwidth service with the second port providing telephone service only, reducing radio frequency ingress and egress magnitudes. Bridging options allow limited bandwidth or full bandwidth communication between distribution cable ports.

Abstract: A universal line card architecture includes core circuitry for performing battery, overvoltage, ringing, supervision, coder/decoder circuit (CODEC), hybrid and test (BORSCHT) functions interconnected to a control processor and processing system. The control processor and processing system serve a plurality of line cards and are configurable to one or more of a plurality of subscriber loop standards in which the line card can operate. Upon receipt of instructions from a configuration system, the processing system configures line card and core network interface elements so that an appropriate subscriber loop standard may be associated with the line card identified in the provisioning request.

Abstract: The present invention relates to a filter arrangement (8C) and a method for frequency filtering and impedance conversion. The invention makes it possible to perform frequency filtering and impedance conversion using fewer inductors than what is required using previously known technique for obtaining the corresponding effect. According to an alternative aspect the invention provides more effective frequency filtering and equivalent impedance conversion compared to the prior art when the same number of inductors are used. According to the invention an electromotive force (e′) is generated in at least one filter coil (L1, L4). The electromotive force is adjusted so that the filter arrangement (8C) receives a desired impedance converting effect. A filter arrangement according to the invention, compared to the prior art, in this manner provides a filter integrated with an impedance converter. Compared to the prior art the invention can make a saving of one transformer per impedance converter possible.

Abstract: Apparatuses and methods for selectively coupling the signals of multiple communications service providers operating in different frequency bands onto one or more station wire segments of a customer premises wiring plant are disclosed herein. The apparatus can include various filtering networks and switching modules to enable each station wire segment of the premises wiring to be concurrently and independently connected to differing service providers.

Abstract: An improved cover is provided for a remote terminal base, the new cover defining an interior cavity having means for mounting a 400-series card electronic card-module therein. The improved cover may replace a standard flat cover on the remote terminal base to facilitate the implementation of a 400-series card module. The interior cavity of the improved cover is deep enough to accommodate the card module and has a hinged intermediate door to which the card module is mounted. When the door is opened, card guides on the door slidably receive the card module. The door is then closable to sealably encase the card module within the cover.