Abstract: An apparatus and method for maintaining access to lifeline services through telephone sets provided with telephone service from a voice over digital subscriber loop (VoDSL) transceiver during power interruptions are described. All telephone sets associated with the transceiver are connected to a wire loop which supports the VoDSL service in the event of a power interruption to the transceiver. The advantage is the economical provision of lifeline service access to all telephone sets when power is interrupted to the transceiver. Thus, confusion is reduced, safety is enhanced, and access to lifeline services is ensured during emergency situations.

Abstract: The present invention uses a wiring scheme for data transmission. The wiring scheme includes designating N−1 telecommunication wires and a common wire to each carry N−1 signals. The wiring scheme further includes designating one telecommunication wire, other than the N−1 telecommunication wires, as a common wire for each of the N−1 wires. In addition, the DC voltage polarities of at least one of the N−1 telecommunication wires may be reversed to reduce the likelihood of overloading the common wire. The wiring scheme may be utilized in the context of many data transmission systems including: POTS, PSTN, DSL, data modems, facsimile modems, and ISDN. The wiring scheme of the present invention may achieve higher data rates for data transmission.

Abstract: The invention relates to a monolithically integrated telephone circuit for driving wide-band telephone lines and transmitting digital data at a very high frequency. The telephone circuit is powered from a battery DC supply providing a pair of voltage references. The telephone circuit includes an output circuit portion including a pair of differential output stages, each having a pair of inputs and being connected with its output to a respective lead of a two-wire telephone line. The telephone circuit also includes a device for deriving a reference voltage from the supply voltage, and includes a low-voltage supply network which is input a DC signal and produces a voltage reference to be added to the reference voltage for delivery to one input of each output stage. The other input of each stage receives an AC signal in order to present at the circuit output a suitable AC+DC differential voltage for driving the telephone line.

Abstract: An xDSL interconnecting device for interconnecting the first analog line and the second analog line, includes: the first analog transmit/receive unit, connected to the first analog line, for transmitting an analog signal having the first frequency band to the first analog line and receiving an analog signal having the second frequency band higher than the first frequency band from the first analog line; the second analog transmit/receive unit, connected to the second analog line, for transmitting an analog signal having the second frequency band to the second analog line and receiving an analog signal having the first frequency band from the second analog line; and an interconnecting unit, connected to the first and second transmit/receive units, for interconnecting communication between the first and second analog transmit/receive units.

Abstract: A control apparatus with a window control function including a distance computation unit for computing a signed n-bit distance as a result of subtraction of a second sequence number cyclically updated to vary like a modulo-N number from a first sequence number also cyclically updated to vary like a modulo-N number where N is a positive integer greater than 1 and the nth power of 2 is greater than N(2n>N), and a lowest-order-bit extraction unit for extracting m lowest-order bits of the distance where the mth power of 2 is equal to N(2m=N). The control apparatus further includes a distance judgment unit for forming a judgment as to whether or not the first sequence number is within a window set with the second sequence number used as a reference by comparison of the m lowest-order bits of the distance extracted by the lowest-order-bit extraction means with a size of the window.

Abstract: A device for remote line powering in a telecommunication network in which electric power is supplied via a plurality of line pairs and aggregated to provide electric power suitable for powering an appliance. The electric power supplied via each of the line pairs is adapted not to exceed a pre-defined threshold.

Abstract: A circuit configuration is provided for supplying a telephone subscriber loop with a supply voltage, for transmitting a transmitted signal into the telephone subscriber loop, and for receiving a received signal from the telephone subscriber loop. The telephone subscriber loop has a first line and a second line. The circuit configuration has a supply voltage source with a first terminal and a second terminal between which a supply voltage drops; a first circuit connected with the first line and having first and second supply voltage connections; and a second circuit connected with the second line and having third and fourth supply voltage connections. The first supply voltage connection is connected with the first terminal and the fourth supply voltage connection is connected with the second terminal. A network-side terminal of a telephone subscriber loop and a chip set are also provided.

Abstract: Transmitting a pre-recorded announcement to the user of an network interface unit (NIU) each time the user places a telephone call if an alarm is set because a battery in an uninterruptible power supply (UPS) is in a low power state. The pre-recorded announcement states that the battery needs to be replaced. The user is given a simple procedure for contacting service personnel at a service center to have the battery replaced in the UPS. In addition, this announcement is overridden if the user starts to dial the emergency telephone number (911). This allows the user to gain immediate access to the emergency telephone number without having to listen to the message stating that the battery in the UPS needs to be replaced. An indicator is also set on NIU upon the battery being in the low power state. If a call is completed to the service center, the alarm is reset for a predetermined amount of time to give the service personnel time to service the battery.

Abstract: A communication system is provided with a power supply budget such that portions of a phone line side circuit may be powered from the TIP and RING phone lines while using standard electronic devices for the hookswitch circuits and the diode bridge circuit. For example, low voltage converters in the phone line side circuit may be powered from the phone line. The low voltage converters may operate off a low voltage power supply of approximately 2.5 V or less, more preferably may operate off a low voltage power supply of approximately 2.0 V or less, and in one embodiment 1.9 V converters may be utilized. The communication system may further include a capacitive isolation barrier system for isolating the phone line side circuitry.

Abstract: According to this invention, a digital key telephone system connected to an analog public network NW having a function of transmitting a ringing signal including identification information of a calling line through a subscriber line (CO line), accommodating a plurality of extension lines each connected to a digital key telephone (DKT) 2 or a standard telephone (STT) 4 as an extension terminal, and having a function of switching and connecting the subscriber line to the plurality of extension lines or the extension lines to each other includes a called party storage means storing, in advance, information representing the correlation between the calling line and the extension terminals 2 and 4 as a called terminal. When a ringing signal arrives from the analog communication network NW, calling line identification information (caller ID) contained in the ringing signal is detected by a calling line identification information interface unit (RCIU) 12.

Abstract: An interworking interface module for telecommunication switching systems has multiple interworking terminal I/O ports, tracking terminal I/O ports, and system terminal I/O ports, and an indicator lamp are mounted on the external panels of a mounting frame. Multiple connection modules are attached onto the inner surface of a mounting frame used for setting up interconnection between the above terminal I/O ports. Each connection module comprises a switching means, such that a terminal separated from the system connection is automatically switched to connect to a terminal resistor to damp any line oscillation due to open connection. Using the connection modules to interconnect the above terminals of the invention, the present invention is able to reduce the necessary interconnecting components and simplify the procedures for assembling a transit exchange platform, while the original service quality with respect to a line connection is maintained.

Abstract: During maintenance of telephony equipment the high voltage ring signals for POTS lines must be disconnected or disabled so as to remove the shock hazard potential associated with the substantially elevated ringing voltage present at a line card of a central office. This problem is effectively obviated by installing a three-terminal alarm fuse socket in a circuit path for the ringing generator, and wiring the socket's terminals to enable the fuse to operate as a switch. The switch is closed by inserting a (blown or unblown) three-pin alarm fuse. This enables a ringing voltage generated by the ringing voltage generator to be applied to the span and delivered to the ringing circuit of the handset. The switch is opened by removing the fuse. Ringing voltage functionality for and/or connectivity with the ringing voltage circuit is selectively dependent upon whether a fuse is installed in the receptacle, irrespective of the state of the fuse.

Abstract: A low-pass filter arrangement associated a clamping circuit for limiting unwanted transient signals to be transmitted through the filter. Mainly the variations (dI/dt) of the current flowing through the filter are eliminated. The filter may form part of a splitter used in an ADSL system to separate low frequency POTS signals from high frequency ADSL signals simultaneously transmitted over a same copper twisted-pair transmission line. The filter comprises the series connection of a coil and the main path of a transistor of which the gate terminal is connected to the opposite end of the coil. In an ADSL system, a classical 7th order low-pass filter may advantageously be replaced by a 3rd order filter arrangement.

Abstract: A computer telephony integration adapter for a telephone system includes a network interface to transmit data to, and receive data from, a network. A network controller is provided to transmit data to, and receive data from, the network interface. The network controller is adapted to package data being transmitted to the network and to unpackage data being transmitted to the telephone system. A telephony interface is also provided to transmit data to, and receive data from, the telephone system. The computer telephony integration adapter also includes a traffic steering device to sort data received from the telephone system, the network, and a computer interface, and to transmit data appropriately to the telephone system, the network, and the computer interface. A signaling device is provided to transmit signaling data to, and receive signaling data from, the telephone system, and to transmit signaling data to, and receive signaling data from, the network.

Abstract: The present invention proposes a device having a voice communication server structure comprising a rack called main rack including:

Abstract: The present invention includes cardbus interface for DSP (digital signal processing) and for controlling the 32-bits information transmission DSP (digital signal processor) is connected to the cardbus interface to process the digital signal. D/A converter is connected to the DSP to transform the digital signal to analog signal. A transmitter amplify is coupled to the D/A converter to amplify the transformed signal. A multi-level filter is connected to the A/D converter via one terminal. The bandwidth of the multi-level filter is about 24K to 1M. The transmitter amplify is coupled to a protection circuit consisting of current protector 152, bias protector, lightning protector and high voltage to low voltage transformer. A phone jack is connected to the protection circuit for plugging the transmission line to communicate to outside.

Abstract: A communication system is provided with a power supply budget such that portions of a phone line side circuit are powered from the TIP and RING phone lines while using standard electronic devices for the hookswitch circuits and the diode bridge circuit. For example, low voltage converters in the phone line side circuit are powered from the phone line. The low voltage converters operate off a low voltage power supply of approximately 2.5 V or less, more preferably operate off a low voltage power supply of approximately 2.0 V or less, and in one embodiment 1.9 V converters are utilized. In one embodiment, the communication system further includes a capacitive isolation barrier system for isolating the phone line side circuitry.

Abstract: A power management system is interfaced with both a local utility power source and a remotely powered span, and monitors the power availability for and requirements of DDS terminal equipment. Upon detecting that local utility power is insufficient to operate the terminal equipment, a power limited converter derives power from the phone line. The span power drawn is limited to a fixed value that prevents the line from collapsing. An auxiliary capacitor stores energy from either local utility power or the span, to provide for periods of extended power operation (including ringing the phone).

Abstract: An improved telephone customer transmission line conditioner, method of making a line conditioner, improved build-out, method of making a build-out, and improved method of conditioning a line using the line conditioner and/or the improved build-out provide improved voice-band transmission as compared to a bare twisted pair, while also allowing the transmission of high-frequency digital signals, such as ADSL signals and other signals. The apparatus and method provide a boost in the high end of the voice-band (approximately 2 kHz to 3.4 kHz) to compensate for the roll-off normally located there in a bare cable, and also provide a substantial rise in the frequency response in a frequency range used for high-frequency digital transmissions. A notch in the response between frequency bands suppresses harmonic cross talk between bands.

Abstract: Telephone line distribution apparatus are provided that permit easy user-selection of primary and secondary telephone lines without requiring physical rewiring of RJ plugs or receptacles. A telephone line distribution apparatus includes a first RJ connector, one or more second RJ connectors, and a switching device that allows a subscriber to designate which of a plurality of incoming telephone lines is the subscriber's primary line and secondary line. A switching device has various user-selectable configurations. When in a first configuration, a first incoming telephone line becomes the subscriber primary telephone line at one or more of the second RJ connectors. When the switching device is in a second configuration, a second incoming telephone line becomes the subscriber primary telephone line at one or more of the second RJ connectors. Additional incoming telephone lines can be designated as primary or secondary telephone lines in a similar manner.

Abstract: A subscriber loop interface circuit having bifurcated common mode control loops includes a DC common mode control for controlling tip and ring DC common mode characteristics, and an AC common mode control for controlling tip and ring AC common mode characteristics, wherein the AC and DC common mode controls are independent. In one embodiment, the DC common mode control includes a tip current source for generating a tip current, idt, and a ring current source for generating a ring current, idr, Each of idt and idr is proportional to a difference between a DC tip voltage (TIPDC) and a control voltage (Vcmcontrol). Thus, in one embodiment, idt=gdt(TIPDC−Vcmcontrol), and idr=gdr(TIPDC−Vcmcontrol). In one embodiment, the AC common mode control includes a tip current source for generating a tip current, iat, and a ring current source for generating a ring current, iar. Each of iat and iar is a function of an AC tip voltage (TIPAC) and an AC ring voltage (RINGAC).

Abstract: A hybrid subscriber matching circuit for an electronic exchange which matches transmitted/received data so as to permit call communications between the exchange and subscribers. The subscriber matching circuit is constructed by individual parts without using a transformer or SLIC, and thus can simplify the peripheral parts thereof as well as strongly resist external impact.

Abstract: The present invention provides a digital subscriber line (XDSL) splitter module that is installable in a telephony field wiring cabinet. Normally, the telephony field cabinet contains a jumper wire interface that is used to interconnect telephone trunk cables with telephone distribution cables. The splitter module operates on signals found on the wire pair extending to a customer premise and it contains a filter circuit to split the POTS and XDSL onto separate wire pairs. The separated XDSL signals can be carried on fiber optic or other high bandwidth media for the purpose of extending the transmission range. The separated POTS signals are directly carried on telephone trunk cables which provide voice service with well-known high reliability.

Abstract: A telephone subscriber module allows a telephone subscriber to selectively interconnect a subscriber telephone line with one of a plurality of available telephone service provider lines. A base has a first jack configured to receive a plug connected to a subscriber telephone line. A second jack, electrically connected to the first jack, is configured to receive a plug connected to a selected one of a plurality of telephone service provider lines to thereby establish an electrical communication connection between the subscriber telephone line and the selected telephone service provider line. The first jack may include a pair of electrical conductors extending outwardly therefrom and terminating in a plug. The plug may be configured to be inserted within a jack adjacent to or remotely located from the first jack to establish an electrical communication connection between a service provider line electrically connected thereto and the subscriber line.

Abstract: A method and apparatus for controlling the DC line current on a telephone line and reducing the amount of error introduced to the system. The error is reduced by compensating for a DC error term introduced by an analog to digital converter having a DC offset. The DC offset is controlled digitally, allowing software to be used to limit the DC error in accordance with predefined parameters. Predefined parameters can be set to accommodate varying country specifications instead of using switches to control resistors and capacitors. In addition, changes in a country's requirements can be accomplished through software, instead of changing components or redesigning a circuit board. The use of software results in increased flexibility by allowing an infinite number of settings via software or software updates, allowing changes to be made quickly and easily throughout the world, and allowing error terms to be accommodated digitally.

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 ringer impedance for a variety of international phone standards while also providing a proper isolation barrier to the phone line is disclosed. More particularly, a DAA circuitry may be utilized which satisfies many or all ringer impedance standards without the use of additional discrete impedance devices. The ringer impedance standards may be satisfied by use of an impedance structure coupled between the TIP and RING lines and actively controlling the current drawn through the hookswitch devices when a ringing event is detected so as to control the impedance seen at the TIP and RING lines during a ringing event. The detection of the ringing event may be performed on the phone line side of an isolation barrier.

Abstract: A communication system for passing information between information services and terminal devices over a twisted wire pair network. The information services include a telephone exchange and other services, such as a data network and a television distribution system. The terminal devices include telephones and other devices, such as computers and televisions. The system includes a main information interface coupled to the information services and to the twisted wire pair network, which couples the terminal devices and to the main information interface. The wiring network includes multiple active telephone pairs for passing voice signals between the telephone exchange and telephones.

Abstract: This invention provides an interface device which allows modems and other terminal equipment to be attached to almost any type of payphone. Such an interface allows data terminal equipment to be connected to the payphone (for example, for e-mail and internet access) and allows additional facilities to be added to a standard payphone.

Abstract: A method and device for delivering high speed telecommunications services in existing network interface devices comprises a network interface unit block or module, with an associated removable customer access module, which can be mounted in an existing slot cavity of an existing network interface device to terminate DSL or T1 service, or “pass-thru” T1 service, so as to provide both traditional residential service and high-speed digital service to a customer.

Abstract: The present patent being described as an interface between a phone line and a microcomputer which, pursuant to the characteristics thereof, has the function of communicating a phone line and the sound board of microcomputer in order to improve the communication, on the basis of construction of a sturdy and versatile interface. With a specific, easily accessible design and shape, practical handling and functionality characteristics, adaptable between any phone line and microcomputer. The present interface is comprised of a printed circuit board packaged in a box with an outlet for stereo audio cable for interconnection with the sound board of microcomputer and phone cable inlet for interconnection with phone line, employed jointly with a computer software installed in the microcomputer, which manages and defines the actual utilization of interface.

Abstract: The present invention discloses an internet address system formed by introducing E.164 number system of the ITU-T or a zip code system to IPv6 address system, and a hierarchical routing method using the same. Thus, a user can easily find an IPv6 address of a user terminal by his/her telephone number. It is also possible to assign the IPv6 addresses relating to about twenty million telephone numbers in the country. The telephone numbers can be well linked to the IPv6 addresses, so that an internet provider can easily design and assign the IPv6 addresses. In addition, a hierarchical routing process is carried out by using the E.164 number system, thereby reducing a routing time and improving a routing speed. Moreover, it is easy to find out the internet address of the user terminal by the subscriber address. The subscriber address can also be found out by the internet address of the subscriber.

Abstract: An apparatus for isolating ADSL signals from POTS signals includes a single low pass filter for filtering the POTS signals for all POTS terminal devices within a customer's premises. The low pass filter is mounted within a line isolation device (LID) connected between a telephone jack and an ADSL transceiver. The customer's wiring is altered so that the ADSL and POTS signals are supplied to blue (B) and yellow (Y) lines, rather than the typical connection to the red (R) and green (G) lines, and the LID returns filtered POTS signals on the R and G lines. The telephone jacks within the premises remain connected to the R and G lines and receive the filtered POTS signals from the LID. Instead of reconnecting incoming signals to the R and G lines upon removal of the ADSL transceiver, a jack is preferably used which automatically shorts the B and Y lines to the R and G lines, respectively, upon removal of the LID from one of the telephone jacks.

Abstract: An improved, more intelligent network interface unit capable of processing signals received from a high speed transmission media and outputting the received signals without substantial amplification or reduction. The network interface unit comprises a regenerator circuit which detects T1 signals from said high-speed transmission media and outputs a digital stream to a serial data processor for processing via a micro-controller. A wave shaper circuit receives the output from the serial data processor and, in conjunction with the micro-controller and a level detector circuit, regenerates signals having substantially the same wave shape and amplitude as the original T1 signals received from said transmission media.

Abstract: A network interface circuit employing differentially driven capacitive couplings across a high voltage isolation boundary and in which a &Sgr;/&Dgr; CODEC is positioned on the line side of the high voltage interface. In this manner, only four wires cross the high voltage boundary, namely differential pairs for transmit data and receive data. The transfer functions for setting AC and DC parameters, such as impedance matching, are provided by digital filters. Further, with the CODEC on the line side of the high voltage isolation interface, the data which crosses the interface is modulated at the &Sgr;/&Dgr; data rate and, thus, capacitive coupling can be used across the high voltage isolation boundary without the loss of DC data.