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1. 发明专利

JP2001230779A ATM COMMUNICATION EQUIPMENT 失效
公开(公告)号：JP2001230779A
公开(公告)日：2001-08-24
申请号：JP2000037061
申请日：2000-02-15
申请人： HITACHI TELECOMM TECH
发明人： TANABEYA KANJI , HIROKAWA MASAHITO , SATO NOBUHITO , MASUDA HIROAKI , YUMINE KOJI
IPC分类号： H04L29/14 , H04L12/26 , H04L12/28
摘要： PROBLEM TO BE SOLVED: To provide ATM communication equipment that can conduct a test for object ports by generating a test cell and traffic. SOLUTION: The ATM communication equipment 1 that has a data terminal port P1, an ATM channel port P2 to transmit a cell via a transmission line installed between the data terminal port and the ATM channel port, is provided with a test cell generating means 141 that generates a test cell on the basis of configuration information of an object port, a means 12 that transmits the test cell to the transmission line via the data terminal port or the ATM channel port, and a discrimination means 146 that receives the test cell returned from the transmission line to discriminate whether or not the test cell is normally returned.

2. 发明专利

JPH10308739A CELL MULTIPLEXER 失效
公开(公告)号：JPH10308739A
公开(公告)日：1998-11-17
申请号：JP35278395
申请日：1995-12-29
申请人： HITACHI TELECOMM TECH
发明人： YUMINE KOJI , SASAKI TOSHIMITSU
IPC分类号： H04Q3/00 , H04L12/28 , H04L12/801 , H04L12/827 , H04L12/865 , H04L12/911 , H04L12/951
摘要： PROBLEM TO BE SOLVED: To convert data that are from plural communication terminals into cells, to effectively use a transmission line, multiplexing cells which have different speeds to plural other parties and also to perform data communication without cell loss. SOLUTION: This multiplexer has a cell conversion control part 22 which consists of plural different destination buffers 221, a cell generation circuit 222, a cell transfer control circuit 223, a different destination information storing part 224, a highway I/F part 225, a data bus I/F part 226 and plural timing generation circuits 227 and 228, and performs multiplexing data transmission among cell multiplexers. In such cases, data which is inputted from a communication terminal that has X.21 and V.35 interfaces is stored in a data buffer, stored data are successively transferred to the different destination buffer, and stored data are sent onto the transmission line in each destination in a prescribed transfer mode, transfer speed and transfer timing.

3. 发明专利

JPH09186695A CELL MULTIPLEXER 失效
公开(公告)号：JPH09186695A
公开(公告)日：1997-07-15
申请号：JP34377295
申请日：1995-12-28
申请人： HITACHI TELECOMM TECH
发明人： YUMINE KOJI , SASAKI TOSHIMITSU
IPC分类号： H04Q3/00 , H04L12/28 , H04L12/801 , H04L12/835 , H04L12/911 , H04L12/951
摘要： PROBLEM TO BE SOLVED: To use effectively a definite transmission line by restricting a data flow when the data amount of a data buffer is a prescribed amount or over, releasing flow restriction when a prescribed amount of idle areas or over is in existence, converting data into cells corresponding to a quality parameter, multiplexing cells and sending them to a digital private channel. SOLUTION: The consumed amount of current channels is grasped by a data storage means being a data buffer 255 and a means grasping the data amount in the data buffer and when the consumed amount exceeds the transmission capacity of the channel, it is detected that data of a prescribed amount or over are stored in a data buffer 255 in a terminal equipment control section 25 and a means limiting data flowing to a communication terminal equipment is used to limit data flowing from the communication terminal equipment. When the amount of idle areas of the buffer in the control section 25 is increased to a degree, the limit of data flowing to the communication terminal equipment is released and the data are accepted. Thus, while using 100% of the transmission capacity of the channel, data communication without aborting the data is conducted.

4. 发明专利

JPH098866A ASYNCHRONIZATION SPEED MATCHING COMMUNICATING SYSTEM 失效
公开(公告)号：JPH098866A
公开(公告)日：1997-01-10
申请号：JP17684795
申请日：1995-06-20
申请人： HITACHI TELECOMM TECH
发明人： YUMINE KOJI , SASAKI TOSHIMITSU
IPC分类号： H04L29/08 , H04L12/02 , H04L29/10
摘要： PURPOSE: To unnecessitate the setting change of communication speed for an opposite party side. CONSTITUTION: A terminal equipment control part 22 is provided inside an incoming call side terminal adapter and a control part 30 reports the communication speed of a call originating side which is detected in the incoming call side terminal adapter from a call control message transmitted from the call originating side with a network to a speed control part 32 and data transmitting part 37. The speed control part 32 converts the communication speed of transmission data from the call originating side into the communication speed of the incoming call side and transmits it to an incoming call side communication terminal equipment with a terminal interface part 31. DMAC 38 successively transfers transmission data from the incoming call side communication terminal equipment, which is received by a data receiving part 36, to a data buffer 39 so as to store it, transfers the data to the data transmitting part 37 so as to successively transmit it in accordance with the communication speed of the call originating side, transmits a data transmission stop instruction to the incoming call side communication terminal equipment when a free area in the data buffer 39 is lost and stops data transmission till the free area is obtained.

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