Abstract: A communication apparatus connected to a PBX and an ATM network is provided with a DTMF signal detecting portion for detecting whether or not a DTMF signal is contained in a voice signal from the PBX, a DTMF signal monitoring portion, a DTMF cell generating portion for coding and sending out a DTMF signal, a DTMF cell decomposing portion for decoding a coded DTMF signal and a DTMF signal generating portion for generating a DTMF signal on the basis of the information content of a decoded DTMF signal and sending out this DTMF signal to the PBX, and the transmission side communication apparatus codes a DTMF signal in a specified form and transmits the DTMF signal and the reception side communication apparatus decodes the coded DTMF signal and, on the basis of this content information, restores the DTMF signal in a DTMF signal generating portion.

Abstract: In real time communication, long interruption of a media data signal caused by underflow or overflow of a buffer is reduced. A monitoring unit 35a monitors a state of the buffer 34 periodically. When the number of encoded data in the buffer 34 shows tendency of increasing from a standard data storage number, successively a predetermined number of times, then, it is judged that the buffer tends to overflow. And, the decoding unit 35 is made to skip at least one encoded data to be read and processed this time from the buffer 34. Further, when the number of encoded data in the buffer 34 shows tendency of decreasing from the mentioned standard data storage number, successively the predetermined number of times, then, it is judged that the buffer tends to underflow. And, the processing unit 35 is made to suspend operation during at least one period of the above-mentioned reproduction period.

Abstract: When a communication system is constructed by use of a plurality of data relay apparatuses of the present invention, it is possible to control an execution/non-execution of a compression/decompression for voice data so that the compression/decompression is not repeatedly executed regardless of a PBX. An ATM multiplexer sends out a transmission pattern to an apparatus adjacent to the ATM multiplexer via a PBX, and stops the compression/decompression of the voice data to relay the voice data transmissively, only when the ATM multiplexer receives the transmission pattern from the adjacent apparatus via the PBX. In other cases, the ATM multiplexer relays the voice data while executing the compression/decompression operation for the voice data.

Abstract: Data on customer's purchase history stored in a database server is searched and edited by using an ID number inputted by a customer. A customer class, a customer rank, a discount rate, and the like are displayed on a personal computer of an operator who responds to the customer that calls a call center.

Abstract: A communication apparatus connected to a PBX and an ATM network is provided with a DTMF signal detecting portion for detecting whether or not a DTMF signal is contained in a voice signal from the PBX, a DTMF signal monitoring portion, a DTMF cell generating portion for coding and sending out a DTMF signal, a DTMF cell decomposing portion for decoding a coded DTMF signal and a DTMF signal generating portion for generating a DTMF signal on the basis of the information content of a decoded DTMF signal and sending out this DTMF signal to the PBX, and the transmission side communication apparatus codes a DTMF signal in a specified form and transmits the DTMF signal and the reception side communication apparatus decodes the coded DTMF signal and, on the basis of this content information, restores the DTMF signal in a DTMF signal generating portion.

Abstract: Arbitration for a bus mastership is performed in accordance with the priority degrees of data which are to be transferred on a bus, by a comparatively simple construction. In a case where interfaces 2, 3 simultaneously output to the bus 1 the priority degrees which correspond to non-ATM lines 6, 7 being the reception sources or transmission destinations of the data stored in ATM cells, and where the priority degrees outputted by the interface themselves are the highest, the interfaces transmit to the bus 1, bus mastership request signals which contain the addresses of the interfaces themselves. A bus control module 4 receives the bus mastership request signals on the bus 1, it determines that one of the interfaces to which the bus mastership is granted, and it outputs to the bus 1 a bus mastership grant signal which contains the address of the determined interface.

Abstract: A communication apparatus connected to a PBX and an ATM network is provided with a DTMF signal detecting portion for detecting whether or not a DTMF signal is contained in a voice signal from the PBX, a DTMF signal monitoring portion, a DTMF cell generating portion for coding and sending out a DTMF signal, a DTMF cell decomposing portion for decoding a coded DTMF signal and a DTMF signal generating portion for generating a DTMF signal on the basis of the information content of a decoded DTMF signal and sending out this DTMF signal to the PBX, and the transmission side communication apparatus codes a DTMF signal in a specified form and transmits the DTMF signal and the reception side communication apparatus decodes the coded DTMF signal and, on the basis of this content information, restores the DTMF signal in a DTMF signal generating portion.

Abstract: A multiplexing equipment included in an ATM network to transmit control line signals for interfacing data communication terminals. The transmission of the control line signals is realized by reserving a field in a payload in a cell format for the control line signal transmission between the data communication terminals, mapping RS/CD, CS, ER/DR, CI of the control line signals at intervals based on a terminal speed, multiplexing the mapped control line signals at the transmission side, and separating the multiplexed control line signals at reception side.

Abstract: Opportunities to transmit ATM cells of identical level onto an ATM line are equally afforded to respective terminal side lines. In a cell assembler/disassembler, data from the terminal side lines 1100 are turned into ATM cells, and the ATM cells are assigned priority levels. Then, the ATM cells are stored in internal buffers 111–116 respectively corresponding to the terminal side lines 1100. The priority controller 1210 selects the ATM cells of the highest priority levels from within the respective internal buffers, and further selects the ATM cell of the highest priority level as an ATM cell to-be-transmitted from among the selected ATM cells. In the presence of a plurality of such ATM cells of the highest priority level, the priority controller 1210 determines the ATM cell to-be-transmitted in accordance with the priority sequence of the internal buffers in which the ATM cells of the highest priority level are stored.

Abstract: A circuit size of a multiplexing apparatus is reduced. In terminal interface units 21a to 23a, data from a terminal is received by each of terminal-side line interface sub-unit 211, and then celluralized by a cell assembly/disassembly sub-unit 28a. The cell is transmitted directly to a priority control unit 242a. In the priority control unit 242a, the cell received from each of the terminal interface units 21a to 23a is stored in each of priority control buffers 243a, and then sent to an ATM network interface unit 24a in the order of priorities sequentially. The cell is synchronized with a line of an ATM network 1a by a network synchronizing sub-unit 241a, and transmitted to the line of the ATM network 1a. With this constitution, an internal bus is unnecessary.

Abstract: A technology is disclosed to enable VP/VC on an ATM network to be backed up by using an ISDN line without presetting any detailed information regarding a backup VP/VC to be set on the ISDN line. An ATM switch A30 is provided to establish the ISDN line connecting with an ATM multiplexer A20 when any failure occurs in an ATM transmission path contacting with the ATM multiplexer A20. Negotiation is carried out with ATM multiplexer A30 by using the established ISDN line so as to decide a channel characteristic of a backup VP/VC to be set on the ISDN line. Then, the ATM switch A30 and the ATM multiplexer A20 communicate with each other by using the backup VP/VC having the decided channel characteristic on the ISDN line.

Abstract: A local networking system includes a memory to store local address numbers of registered local terminals; a specified number checking unit to check, when the system receives a first dial number from an unregistered local terminal, whether the first dial number is the same as a specified number; a registration checking unit to receive, when the first dial number has been found to be the same as a specified number, a second dial number from the unregistered terminal, and to check whether a local address number corresponding with the second dial number is stored in a memory; a non-registration checking unit to receive, when such a local number has been found to be stored in memory, a third dial number from the unregistered terminal and to check whether a local address number corresponding with the third dial number is stored in memory; and a registration unit to allocate, when a local address number corresponding with the last third dial number is not stored in memory, the third dial number to the unregistered t

Abstract: A line switching system of a dynamic band variation unit (10) having a function of connecting a dynamic data terminal device (30A) to an opposing data terminal device (30B) through a number of trunk lines such as a dedicated line (21) or ISDN lines (22-24), wherein the quantity of data to be sent out to a trunk line is varied after the quantity of data to be stored to the dynamic band variation unit is adjusted by varying the communication speed of the data transmitted from the dynamic data terminal unit, when varying the data communication quantity of the data terminal device by increasing or decreasing the number of trunk lines.

Abstract: Each of multifunctional telephones has a common hold button for accepting a hold/hold release instruction of a communication partner (extension) under transfer communication; a central processing equipment controls each part of a private branch exchange so that the transfer communication partner concerned is held in accordance with a hold instruction from a multifunctional telephone under transfer communication; the information of a hold target (extension) is registered into a hold information registration area; in accordance with a hold release instruction from a multifunctional telephone holding a communication partner, the information of the communication partner specified by the instruction is searched from the hold information registration area; and the holding of the communication partner specified by the searched information is released to connect the communication partner to the multifunctional telephone concerned, whereby the communication partner (extension) under transfer communication can be held

Abstract: A communication network capable of establishing an SVC bypass route when a failure occurs in a PVC multiplexed line wherein each of ATM switches at both ends of a PVC stores the relations of SVC specifying information and the other party PVC information in association with each PVC in a management table. At the time of bypassing, one of the switches transmits a message including the other party PVC information to another ATM switch for each PVC to be bypassed and another ATM switch specifies a PVC to be switched on the basis of the received message and switches the PVC to an SVC specified by the corresponding SVC specifying information stored in the management table.

Abstract: A congestion control method and apparatus that conducts congestion control for a frame relay terminal in real time and without any time lag when a congestion has occurred at an outgoing cell store medium of a fast multiplex unit of an ATM multiplex apparatus. The fast multiplex unit of the ATM multiplex apparatus is provided with a outgoing cell store medium monitor unit monitoring a congestion level of the outgoing cell store medium and generating a congestion reporting signal indicative of the congestion level and a light/heavy congestion indication signal. The time lag which occurs when the congestion reporting is made is eliminated by sending both signals directly to a frame relay interface control unit from the fast multiplex unit.

Abstract: A communication apparatus connected to a PBX and an ATM network is provided with a DTMF signal detecting portion for detecting whether or not a DTMF signal is contained in a voice signal from the PBX, a DTMF signal monitoring portion, a DTMF cell generating portion for coding and sending out a DTMF signal, a DTMF cell decomposing portion for decoding a coded DTMF signal and a DTMF signal generating portion for generating a DTMF signal on the basis of the information content of a decoded DTMF signal and sending out this DTMF signal to the PBX, and the transmission side communication apparatus codes a DTMF signal in a specified form and transmits the DTMF signal and the reception side communication apparatus decodes the coded DTMF signal and, on the basis of this content information, restores the DTMF signal in a DTMF signal generating portion.

Abstract: A communication apparatus connected to a PBX and an ATM network is provided with a DTMF signal detecting portion for detecting whether or not a DTMF signal is contained in a voice signal from the PBX, a DTMF signal monitoring portion, a DTMF cell generating portion for coding and sending out a DTMF signal, a DTMF cell decomposing portion for decoding a coded DTMF signal and a DTMF signal generating portion for generating a DTMF signal on the basis of the information content of a decoded DTMF signal and sending out this DTMF signal to the PBX, and the transmission side communication apparatus codes a DTMF signal in a specified form and transmits the DTMF signal and the reception side communication apparatus decodes the coded DTMF signal and, on the basis of this content information, restores the DTMF signal in a DTMF signal generating portion.

Abstract: A communication apparatus connected to a PBX and an ATM network is provided with a DTMF signal detecting portion for detecting whether or not a DTMF signal is contained in a voice signal from the PBX, a DTMF signal monitoring portion, a DTMF cell generating portion for coding and sending out a DTMF signal, a DTMF cell decomposing portion for decoding a coded DTMF signal and a DTMF signal generating portion for generating a DTMF signal on the basis of the information content of a decoded DTMF signal and sending out this DTMF signal to the PBX, and the transmission side communication apparatus codes a DTMF signal in a specified form and transmits the DTMF signal and the reception side communication apparatus decodes the coded DTMF signal and, on the basis of this content information, restores the DTMF signal in a DTMF signal generating portion.

Abstract: A LAN connector 30 inserted between a high level equipment 11 and low level equipment 21, and incorporating only protocols for the first layer or up to the second layer for OSI to enable the transmission of communication data between the high level equipment and the low level equipment, comprises a ROM 65 to store disorder notification patterns correspondent with possible disorders, and a disorder notification control portion 51 which monitors an upside-originated idle signal from the high level equipment 11, or a downside-originated idle signal from low level equipment 21 using the protocol for the first layer; detects a disorder involving a component of the network as well as a disorder involving the LAN connector itself based on the monitoring result of the upside- or downside-originated idle signal; reads out from ROM a disorder notification pattern correspondent with the disorder thus detected; and transmits the pattern to the high level equipment 11 via an optical cable 70.