Abstract: In a telephone network, customized advanced intelligent network (AIN) services are provided to standard IN/1 "800" service customers. An IN/1 service switching point (IN/1 SSP) receives a call directed to the standard IN/1 "800" service customer, and generates an "800" query to an "800" services data base. An "800" service control point ("800" SCP) generates an "800" response containing a carrier identification code, and the IN/1 SSP routes the call via a trunk group designated by the carrier identification code. An AIN-equipped service switching point (AIN SSP) then generates an AIN query to an AIN services data base. In response, an AIN-equipped service control point (AIN SCP) executes AIN service records corresponding to the standard IN/1 "800" service customer to generate an AIN response containing call processing instructions. The AIN SSP then uses the call processing instructions to complete the call.

Abstract: A positive temperature coefficient thermistor element comprising a plate-shaped ceramic body made of a ceramic material whose Curie temperature is in the range of 60.degree. to 120.degree. C., and having a thickness of 2.5 to 5.0 mm, and electrodes formed on both major surfaces of the ceramic body.

Abstract: A circuit for generating dial pulses and a circuit for forming the direct current loop of a line have conventionally been made up of relays and a coil. In the present invention, these circuits are made up of components, such as capacitors and a semiconductor switching element, to render a network control unit smaller. A compensating circuit is provided for reducing the distortion (caused by the capacitor in the DC loop) of the waveforms of dial pulses and rise waveforms of a direct current when the direct current loop is formed.

Abstract: Automatic Customer Callback (ACC) functionality is implemented directly into service logic of an Advanced Intelligent Network (AIN). The Advanced Intelligent Network includes a Central Office Switch (COS) which is provided in electrical communication with Service Control Point (SCP), at least one calling party, and at least one called party. The AIN components preferably communicate with one another through Transaction Capability Application Part (TCAP) signaling protocol and are directed for use in an AIN 0.2 network. An adjunct processor such as an Intelligent Peripheral (IP) is also provided in electrical communication with the COS. In operation, digits dialed by the calling party (those corresponding to the telephone number of the called party) are collected as well as the calling party telephone number. If the called party line is busy, then the calling party activates the Automatic Customer Callback (ACC) service, the subscriber's telephone line will be monitored to detect an idle condition.

Abstract: A telecommunications system with a call waiting feature, comprises a central office and a plurality of subscribers. The system includes an arrangement for transmitting a signal over an off-hook line to alert the subscriber to the presence of an incoming call, and a cancel call waiting (CCW) register at the central office. The CCW register is associated with each subscriber line and is set to cancel the call waiting feature in response to receipt of a cancellation code over the associated subscriber line and is reset upon termination of a subsequent call. The central office further comprises a delayed cancel call waiting (DCCW) register for each subscriber line with at least a first state and a second state. The DCCW register is set to the first state in response to receipt of a DCCW access code transmitted over its associated subscriber line. An arrangement is provided for checking and resetting the state of said DCCW register when the associated line goes off hook in response to an incoming call.

Abstract: A cross point switch mounted on a telephone-related device such as a telephone. When an alternate power source request signal is low, switches are controlled in response to external data. When the signal is high, a predetermined switch or switches are forced to be turned on and other switches are forced to be turned off. As a supply voltage obtained from a commercial power supply drops, the request signal goes high. When the request signal is high, a voltage obtained from telephone line power is supplied only to necessary electric circuits. Only the most basic functions such as talking over a telephone line can be used such that power consumption can be minimized.

Abstract: A data transmitter-receiver device transmits a forward data to a communication channel, and receives a backward data with a returning echo noise from the communication channel. The device is provided with a first modulator for modulating the forward data into a first digital signal. A D/A converter converts the modulated first digital signal into a corresponding outgoing analog signal which is transmitted to the communication channel. A delay memory is operated to delay the forward data by a certain time delay corresponding to a return time interval of an echo noise. A second modulator modulates the delayed forward data into a second digital signal. An A/D converter receives an incoming analog signal to convert the same into a corresponding third digital signal. An echo canceler operates based on the first and second digital signals for removing an echo noise from the third digital signal. A demodulator demodulates the third digital signal after removal of the echo noise to produce a backward data.

Abstract: In an operation of setting a pause when registering a dial number, if a pause key is not input in immediate succession for a predetermined number of times, first pause data for generating a predetermined pause time is stored. If the pause key is input in immediate succession for a predetermined number of times, a mode for setting a pause time is provided, and second pause data for generating a pause corresponding to input time data is stored. When performing a call, a pause corresponding to stored pause data is generated.

Abstract: A data backup apparatus for temporarily storing the data stored in a volatile memory using an internal battery when the main power is stopped. When the operation of the internal battery is started, the data stored in the volatile memory as a digital signal is converted into an analog signal by a D/A converter, and then it is stored in a magnetic storage unit. When the power supply is restored, the data stored in the magnetic storage unit as the analog signal is read out and converted into the digital signal, and then it is restored to the volatile memory.

Abstract: In a load control system having n types of processes provided for processing requests of an identical type, a load processing unit executes one of m types of processes among the n types of processes in response to one of the processing requests where n and m are respectively integers equal to or larger than 1 and m is equal to or smaller than n. A monitor unit periodically monitors a load of the load processing unit and selects the m types of processes from among the n types of processes on the basis of the load of the load processing unit. An execution ratio calculation unit determines execution ratios of the m types of processes so that the load of the load processing unit is equal to or lower than a first reference value and an execution ratio of at least one of the types of processes is equal to or higher than a second reference value. The load processing unit executes the m types of processes in response to the processing requests with the execution ratios of the m types of processes.

Abstract: A system for producing voice message keepsakes includes a message processor which may be accessed over a plurality of communication links, such as telephone lines. The processor may be so accessed by a customer's communication set, such as a conventional telephone set, or by a subscriber set, and it is capable of distinguishing the two. When accessed by a customer's set, the processor permits the caller to create a temporary mailbox associated with his gift purchase, in which he may then record a voice message. When called by a subscriber set, the processor permits previously created mailboxes to be accessed and will transfer the message recorded therein to the subscriber set. The subscriber set includes a receptacle for receiving a voice message keepsake in accordance with the present invention, and it will record thereon stored messages provided from the message processor, under control of the message processor.

Abstract: An incoming call transfer terminal for transferring to a third-party terminal a call-setting message coming from a calling terminal. The incoming call transfer terminal receives the call-setting message over a first communication channel from the calling terminal. Given the message, the incoming call transfer terminal generates a new call-setting message destined to the third-party terminal by keeping intact those parts of the original message which are needed to establish a through communication channel from the calling terminal to the third-party terminal; by also preserving such information unique to the calling terminal as a calling sub-address and a called sub-address to be transmitted unchanged to the third-party terminal; and by rewriting other parts of the original message to indicate that the call is being transferred from the incoming call transfer terminal. The calling number of the calling terminal is transferred as carried on the calling sub-address, called sub-address or user-user information.

Abstract: A subscriber terminal apparatus for connecting plurality of subscriber lines from subscriber units with a remote switching station via communication lines, the apparatus including: a selective switching unit, provided with a first number of subscriber terminals connected to the respective subscriber lines and a second, smaller number of station terminals connected to the communication lines, for selectively switching connections between the station terminals and the subscriber terminals; a communication unit, associated with the communication lines, for transmitting a signal from the apparatus to the switching station and for receiving a control signal supplied from the switching station; and a control unit, associated with the communication unit and the selective switching unit, for selecting one of the subscriber terminals of the selective switching unit and one of the station terminals thereof in accordance with the control signal from the communication unit, and for controlling the switching operation of

Abstract: A centrex with an attendant console sharing system wherein there is no restriction in an extension line numbering plan so that an attendant console can accept a call to any business group and will connect the call only to the extension line station of the business group for which the call is destined. Means for connecting 12 of the centrex links attendant console 2 to business group attendant console data corresponding to the business group for which an incoming call is destined in accordance with pilot number-to-attendant console conversion table 3 when the call arrives at attendant console 2 from a public network subscriber and in accordance with business group number-to-attendant console conversion table 4 when the call arrives from an extension line station of the business group.

Abstract: A telephone in-use indicator having a diode bridge which is connected to a telephone line. The diode bridge ensures than an input signal from the telephone line is at a constant polarity. An inverter is connected to the diode bridge and receives a signal from the telephone line through the diode bridge. The inverter operates to invert the signal received from the telephone line. An oscillator receives a signal output from the inverter. A light emitting diode is connected to an output of the oscillator and is intermittently driven by the oscillator. A power source powers the inverter, oscillator and light emitting diode. When one telephone extension along the telephone line is changed from an "on-hook" to an "off-hook" condition, a drop in voltage is detected. As a result, the light emitting diode is intermittently driven by the oscillator to thereby provide an indication that a telephone line is in use.

Abstract: A remotely controlled telephone operator simulator includes a microprocessor control circuit for supplying digitally recorded voice messages and non-voice messages, as initial "answers" to an incoming telephone call, which is automatically "call forwarded" to a remote telephone set. When the call is received at the remote telephone set, the user supplies tone signals back to the initial called line. Duplexer circuits and a two-input multiplex circuit are provided to prevent these tone signals from being heard by the calling party on the first line. The tone signals, however, do cause operation of the microprocessor control circuit, to cause selected ones of the voice and non-voice messages to be supplied through the multiplex circuit to the calling line. After the desired number of these stored messages are supplied, the microprocessor control circuit switches the multiplex circuit from response to the stored messages to "live" outgoing conversation from the second telephone line.

Abstract: A telephone line repeater (28) includes a pattern decoder/recognizer (100) which recognizes, inter alia, an input interrogating signal transmitted on a telephone network (20). The interrogating signal includes an address field (302) having at least one subfield (304) therein. The pattern decoder (100) determines that its repeater (28) is to be tested, if a predetermined subfield (304) of the interrogating signal is configured according to a predetermined select convention. When the repeater (28) recognizes that it is being addressed, a controller (110) causes the addressed repeater to "loop back", returning, in alternating sequence, test-indicative no-operation signals and diagnostic information ("DSM") signals generated by the repeater. Methods for testing a repeater and methods for testing telephone networks are also disclosed.

Abstract: A subscriber line interface circuit, coupled between a telephone unit terminal and a switching system, includes a coding and decoding circuit for controlling analog voltages inputted thereinto and outputted therefrom, using a direct current bias voltage, and an interface circuit. The interface circuit has an amplifier for detecting the analog voltage output, a unit for detecting a direct current bias voltage of the analog voltage output, a subtracting unit for determining the difference between the detected analog voltage output and the detected bias voltage, and resistors for driving the telephone unit terminal on the two-wire side. The analog voltage and the direct current bias voltage output terminals of the encoding and decoding circuit are directly connected with the input terminal of the amplifier for detecting the outputted analog voltage and the interface circuit, respectively, so that only a desired alternating current signal is outputted to the telephone unit terminal on its two-wire side.

Abstract: A global subscriber group service system capable of accommodating individual subscribers as a terminal within a global subscriber group. The system also permits the subscriber to access a service control node for new registration or modification of the types of services. The system, therefore, includes a customer access function in a local switching node that is controlled by the service control node. The customer access permits the subscriber to access the service control node to make a necessary registration or a change of the type of services.

Abstract: Customers that have groups of stations served from multiple digital switching systems, which frequently include mixtures of PBXs and Centrex, require capabilities that will allow those station groups to operate as one global group. This invention permits customer station groups, including PBXs and Centrexes interconnected by private facilities or by the public switched telephone network (including long distance carriers), to act as a single entity that supports integrated voice and data communications. Advantageously, Integrated Services Digital Network (ISDN) Primary Rate Interface (PRI) facilities are used to carry the communications and signaling to and from the PBXs.