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Hitachi Telecom Technologies, Ltd. Patents
Assignee:
Hitachi Telecom Technologies, Ltd.
Address:
Koriyama, JP
No. of patents:
53
Patents:


1 2


Patent Number Title Of Patent Date Issued
D421423 Card reading-writing device with modem March 7, 2000
7120171 Packet data processing apparatus and packet data processing method October 10, 2006
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 stan
7103036 Voice data relay apparatus September 5, 2006
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 regardl
7099456 Call center system August 29, 2006
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
7062033 DTMF signal transmission method and communication apparatus June 13, 2006
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 sen
7058060 ATM apparatus, IP apparatus and bus system June 6, 2006
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-
7050570 DTMF signal transmission method and communication apparatus May 23, 2006
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 sen
7050438 Cell creation method for control line signals of ATM Network and multiplexing equipment May 23, 2006
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 betw
7035265 Multiplexer and priority control method for packet data transmissions April 25, 2006
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
6970460 Multiplexing apparatus November 29, 2005
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
6898178 ATM device, subscriber system, communication system and backup method May 24, 2005
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 A
6892232 Local networking system for registering unregistered terminals May 10, 2005
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
6862290 Line switching system and line switching unit of dynamic band variation unit March 1, 2005
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 t
6836545 Communication system, exchange and communication holding control method December 28, 2004
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
6822962 Virtual connection switching method and ATM switch November 23, 2004
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
6810014 ATM multiplex apparatus and congestion reporting method October 26, 2004
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
6772373 Disorder detecting device August 3, 2004
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,
6714640 Communication system, exchange and extension call processing method March 30, 2004
Each of ISDN extension terminals which are connected in a point-multipoint connection mode transmits call initiation information while identification information thereof is contained in the call initiation information when a call is initiated: a private branch exchange includes a main me
6700973 System for transmitting DTMF signal and communication equipment thereof March 2, 2004
A communication apparatus 1 or 2 connected to a PBX 4 or 5 and an ATM network 3, is provided with a DTMF signal detecting portion 102 for detecting whether or not a DTMF signal is contained in a voice signal from the PBX 4 or 5, a DTMF signal monitoring portion 103, a DTMF cell gener
6647104 Speech system, extension communication terminal, and method of up-loading data for communication November 11, 2003
A telephone system requiring no upload of station data which is reset or set after a seat change even if the station data is not uploaded to a data management equipment whenever the operation change the station data of an extension communication terminal. Each of the extension communicat
6646712 Command system for performing centralized management of data in a command desk November 11, 2003
The invention stores command data such as a trunk number, a dial number and the like in storage units 202 and 205 of a command desk 2, and when the kind of a connection is inputted from the command desk 2, it transfers these command data to an exchange apparatus 1 and the exchange appara
6507578 Channel division control equipment of the ISDN primary rate interface circuit January 14, 2003
An ISDN primary rate interface circuit having a plurality of communication channels, includes a channel division controller. According to predetermined conditions, the channel division controller selects a communication channel out of the plurality of communication channels when gene
6487279 Telephone terminal and telephone exchange system accommodating the terminal November 26, 2002
A telephone terminal has a large size display indicating a telephone operation display of a touch panel system and it is used, for example, in a dealing speech system of financial organizations and the like. The telephone terminal has telephone operation indication functions which co
6477241 Sound recording controller for dealing speaking system November 5, 2002
The invention relates to a recording control apparatus in a dealing talk system, and aims at making it possible for a dealer to easily listen to a talk content recorded in a talk recording unit 1-29, and the invention is provided with a line control unit 1-2 to accommodate a digital line
6408055 Electronic mail pop-up control system June 18, 2002
An electronic mail pop-up control system in a dealing system for lightening a burden on a dealer handling a large amount of information at the same time by reducing the number of operations to be done on a dealing talk terminal, said control system lightening a burden on a dealer by
6345054 Cell relay communication method, cell relay communication system and cell relay communication eq February 5, 2002
A cell relay communication equipment 50 to be used in a relay system connecting a transmission device 10 having a voice relay function and a call transmission/reception control function through a CLAD device 30 to an ATM network 20, wherein a relay call identification/indication means 51
6263000 Remote trading call terminals in a trading call system July 17, 2001
A trading communication system. A line control unit includes a channel switch circuit, a number of line trunks connected to the channel switch circuit and adapted to be connected to a line network, and a number of line circuits connected to the channel switch circuit. A number of first
6215794 Multiple band change-over method for multiplex communication equipment April 10, 2001
A multiplex communication system is provided with a plurality of multiplex communication equipment connected to each other through an exclusive line. The multiplex communication equipment have a plurality of a structure information for setting multiple bands. The multiple bands are chang
6192047 Time division multiple equipment February 20, 2001
In a terminal interface, signal data of a terminal is carried on a multi-frame having a period of one per an integral number of the frame period of a digital channel. The terminal interface is connected to a multiple portion through a time division switch. The multiple portion picks
6141343 Channel division control equipment of the ISDN primary rate interface circuit October 31, 2000
An ISDN primary rate interface circuit having a plurality of communication channels, includes a channel division controller. According to predetermined conditions, the channel division controller selects a communication channel out of the plurality of communication channels when gene
6122292 Dynamic band allocation system September 19, 2000
A dynamic band allocation system wherein the bands of a SD-I line 20 are divided into a sub-rate band used by sub-rate units and a bit multiplex band, the sub-rate band being used as an on-demand band where a trunk and a channel are selected dynamically for connection according to demand
6031902 Dealing communication system February 29, 2000
The invention has a purpose of making the operability and functionality of a simultaneous all together communication (a broadcasting communication) good. A dealing communication system of the embodiment provides with COT 1-2 to be called with a public line, DBDLIN 1-7 connected to BD 1--
6031824 Maintenance and supervisory control method and system for multiplex communication equipment February 29, 2000
A maintenance and supervising system and method for a multiplex communication system having mutually connected multiple pieces of multiplex communication equipment. A call controller executes call control by common channel signaling. A multiplexer multiplexes multiple communication d
5999516 Multiplex communication equipment and communication test method thereof December 7, 1999
Multiplex communication equipment 1A used in a multiplex communication system, has a memory portion 12 memorizing the equipment number for the communication test. When there is an incoming call with reference to the same equipment number as one of the multiplex line 1A from the multiplex
5987039 Multiplexing system for ISDN circuits November 16, 1999
A multiplexing system for ISDN circuits. Multiplexers in the system include data terminals, voice interfaces having voice trunks, high speed digital circuits and ISDN circuits, together with a control channel interface which connects trunking circuits by controlling calls on the control
5953313 Circuit switching control method for multiplex communication equipment September 14, 1999
A multiplex communication equipment which can switch circuits and which enables cost saving in circuit usage of a public network when the circuit is switched. Multiplex communication equipment 1 with circuit switching control, which is selectively connected to either an active circuit 5,
5946382 Button telephone equipment for display of calling public line number August 31, 1999
This button telephone equipment comprising a plurality of button telephone apparatus 2a-2m having a plurality of the public line button 23 and a display for displaying the sender's information, and an auto-exchange apparatus 1, this auto-exchange apparatus 1 detecting the operation of th
5905551 Electric appliance, its assembling method, and its housing structure May 18, 1999
An upper case and a lower case are fixed without using screws so that assemblage workability is improved. An electric appliance can be divided into plastic upper case, metal-plate-made lower case, and logic package having print substrates. As a result, the electric appliance is easy to
5754642 Telephone terminal having multiple handsets May 19, 1998
A telephone terminal has a plurality of handsets and at least one button to input a demand for starting an outgoing call or receiving an incoming call. The terminal includes a demand recognition unit for recognizing the input demand through the one button. The terminal also includes a se
5719855 Digital telephone switching system having plural terminal devices directly connected to a common February 17, 1998
A plurality of digital telephones 2A, 2B are provided in direct multiple connection with a digital line 4 introduced from a private branch exchanging system. Each of the digital telephones 2A, 2B sends a burst signal containing its own telephone call data, and burst signals from the
5666409 Dealing board September 9, 1997
A dealing board has a dealing board main body having a box-like structure. The box-like structure includes a top plate, bottom plate, front face plate and rear face plate. The top plate is forwardly slanted relative to the top of a desk on which the main body is mounted and has a number
5661793 Key unit August 26, 1997
A key unit is provided with a first print substrate on which a contact portion and a LED capable to be mounted on flat surface are mounted, a conductive contact rubber, placed on the first print substrate, having a movable contact portion which can contact with the contact portion and an
5651061 Telephone exchange system July 22, 1997
A telephone exchange system useful for a dealing speech system or the like is disclosed, which can accommodate large numbers of lines (or trunks) and permit improvement of the reliability and call connection processing capacity. The system comprises exchange sub-systems A (EX-A) and B (E
5602722 Electric appliance, its assembling method, and its housing structure February 11, 1997
An electric appliance includes a case, an accommodation portion for accommodating a liquid crystal indicator, and upper and lower protrusions respectively arranged above and below an opening provided on stepped portion not arranged on the front face portion of the accommodation porti
5594625 Electric appliance, its assembling method, and its housing structure January 14, 1997
An upper case 1 and a lower case 2 are fixed by no screw, so that assemblage workability is improved. An electric appliance can be divided into plastic upper case 1, metal-plate-made lower case 2, and logic package 9 having print substrates. As a result, the electric appliance is eas
5581446 Housing structure of electric appliance and disassembling method thereof December 3, 1996
A housing structure of an electric appliance has an upper case and a lower case. The upper case is provided with a plurality of logic holding portions arranged on inner sides of left and right side face portions of the upper case. An interior one of the logic holding portions has a p
5471525 Line status display system for telephone exchange system November 28, 1995
In a telephone exchange system accommodating a large number of communication lines, a line status display system is provided, which permits display of the status of a large number of lines in a limited display space of the terminal for scale reduction, is capable of flexible use with
5465292 Trading telephone November 7, 1995
A trading telephone unit of a trading telephone system includes three display devices and control keys on the trading telephone unit. A first display device is provided at an upper left side of the unit having a function keyboard and a ten-key keyboard provided thereunder. On the right
5461543 Electric appliance, its assembling method, and its housing structure October 24, 1995
An upper case 1 and a lower case 2 are fixed by no screw, so that assemblage workability is improved. An electric appliance can be divided into plastic upper case 1, metal-plate-made lower case 2, and logic package 9 having print substrates.
5461377 Panel unit of dealing board October 24, 1995
A panel unit for a dealing board has a display and a keyboard unit provided with buttons. The display is divided into individual indications which display function names corresponding to the buttons. The keyboard unit has a printed substrate arranged on the display, fixed contacts which
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