公开(公告)号：JPS58107745A

公开(公告)日：1983-06-27

申请号：JP20784281

申请日：1981-12-22

Applicant: FUJITSU LTD

Inventor： IIJIMA KOUJI ,  MATSUDA TAKASHI ,  KOBAYASHI OSAMU

IPC: H04L1/22 ,  H04L12/437

Abstract: PURPOSE:To eliminate system-down due to a failure from a frame generating section, by confirming the folding of a frame of a main logical section, when a monitor section detects out-of-synchronism of a system in use. CONSTITUTION:Each remote terminal station is under loop transmission by an N system transmission line, an N system repeater, an N major logical section 6, and a channel section 7 normally. In case of a failure of the N system, the failure is detected at the monitor section and the system N and E are changed over. Especially, in case of out-of-synchronism, it is detected and an electric folding section 9 of the system in use is operated for the performance of the frame test, and if the failure is a failure of a frame generating section of the N major logical section, the logical section is instantly switched to the E major logical section 6'.

公开(公告)号：JPS5775040A

公开(公告)日：1982-05-11

申请号：JP15118980

申请日：1980-10-28

Applicant: Fujitsu Ltd

Inventor： IIJIMA KOUJI ,  MITA TERUYOSHI

IPC: H04B10/27 ,  H04B10/00 ,  H04B10/07 ,  H04B10/077 ,  H04B10/079 ,  H04B10/275 ,  H04B10/524 ,  H04B17/00

CPC classification number: H04B10/079 ,  H04B10/6931

Abstract: PURPOSE:To prevent a communication fault from occurring, by detecting degradation of the light emitting element of the optical transmitter of the preceeding station by respective node stations, which constitute an optical communication loop network, and a supervisory control station to transmit an alarm signal. CONSTITUTION:In each node station and a supervisory control station, the optical signal from an optical signal input terminal 10 is converted to an electric signal in a light receiving part 1, and the signal is taken out to an output terminal 1 through an amplifier 3 and a waveform shaping circuit 4. A part of this signal is applied to a light receiving level monitor part 7 through a peak-to-peak value detecting circuit 6 and an automatic gain adjusting circuit 5. At this time, since the photodetector has the characteristic changed by temperature, it is corrected by a temperature correcting circuit 8. When the photodetector is degraded and the level is lowered in a certain degree, an alarm circuit 9 transmits an alarm to an alarm output terminal 12. The time slot issued always for monitor is provided with one bit for insertion of the local address and the level alarm to transmit this alarm.

Abstract translation: 目的：通过检测构成光通信环路网络的各个节点站的前一站的光发射机的发光元件的劣化以及用于发送报警信号的监控控制站，防止发生通信故障。 构成：在每个节点站和监控站中，来自光信号输入端子10的光信号在光接收部分1中被转换为电信号，并且该信号通过放大器3被取出到输出端1 和波形整形电路4.该信号的一部分通过峰 - 峰值检测电路6和自动增益调整电路5施加到光接收电平监视器部分7.此时，由于光电检测器具有 特性由温度改变，由温度校正电路8校正。当光电检测器劣化并且在一定程度上降低电平时，报警电路9向报警输出端子12发送报警。始终为 监视器提供一位用于插入本地地址和级别报警以传送此报警。

公开(公告)号：JPS5992650A

公开(公告)日：1984-05-28

申请号：JP20303782

申请日：1982-11-19

Applicant: FUJITSU LTD

Inventor： IIJIMA KOUJI ,  UOZUMI ITSUKAN ,  MATSUDA TAKASHI

IPC: H04L12/437

Abstract: PURPOSE:To prevent the trouble of the network of a looped network system wherein transmission lines is doubled, by providing a slave monitoring node in addition to a master monitoring node and allowing the slave monitoring node to function as a substitute for the master monitor node when the master monitoring node is faulty. CONSTITUTION:The master monitoring node MS6 monitors all nodes to find abnormality and performs necessary loop-back control, etc. The slave monitoring node SS7 monitors the master monitoring node MS6 all the time and if the master monitoring node MS6 gets out of order, the loop-back control to a terminal station node TN1 adjacent to the master monitoring node 6 is performed to disconnect the master monitoring station 6 from the loop, so that the slave monitoring station 7 operates as a substitute for the master station 6.

公开(公告)号：JPS587951A

公开(公告)日：1983-01-17

申请号：JP10585481

申请日：1981-07-07

Applicant: FUJITSU LTD

Inventor： IIJIMA KOUJI

IPC: H04L1/22 ,  H04L12/437

Abstract: PURPOSE:To improve the efficiency of maintenance when one transmission system is troubled in a working and spare double-loop network by connecting the transmitting/receiving part of the spare system to the transmission line of the trouble system and switching the transmission side of a supervisory control unit in the spare system to manual operation. CONSTITUTION:At a normal time, selectors 21, 22 connect data receiving parts 12, 12' and transmitting parts 13, 13' inparallel respectively and are connected to a transmission line 0. When the line 0 is troubled, working transmitting and receiving parts 13, 12 are connected to a transmission line 1 so as to operate as an on-line and the spare transmitting and receiving parts 13', 12' are connected to the line 0. A selector 23 connects the transmitting and receiving sides of a supervisory control unit SV19 to the transmitting parts 13, 13' and the receiving parts 12, 12' respectively. A selector 24 switches the transmitting side of the spare system from the automatic side 26 to the manual side 27 to manually send a control signal to the transmitting part 13' and check the trouble status of the line 0. After finding a trouble position of the line 0, a maintenance man is dispatched to the trouble position to repair the fault, improving the efficiency of maintenance.

公开(公告)号：JPS57162554A

公开(公告)日：1982-10-06

申请号：JP4638281

申请日：1981-03-31

Applicant: FUJITSU LTD

Inventor： IIJIMA KOUJI

IPC: H04L12/437

Abstract: PURPOSE:To realize an accurate detection and exclusion of an area of disconnection of a loop transmission line by a loop-back operation even in case a node station having the by-pass mode exists. CONSTITUTION:In case a fault of disconnection arises at the point A on a loop transmission line as shown in the diagram with a node station 14 by-passed, a monitor station 10 transmits a command to carry out the loop-back from line No.0 through line No.1 to the node stations 16, 15, 14 and 13 in that order to obtain a replay. However, no replay is given from the station 16 through the station 14, and the replay is obtained at the station 13 for the first time. Thus the loop-back is fixed at the station 13. After this, the station 10 delivers a loop-back command to give the loop-back from line No.1 through line No.0 to the nodes stations 13, 14, 15 and 16 in that order to obtain a replay. No replay is given from the station 13 since the disconnection is caused between the stations 13 and 14 as well as from the station 14 since the station 14 is by-passed. Thus the reply is obtained for the first time from the station 15. The loop- back is fixed at the station 15.

公开(公告)号：JPS5962242A

公开(公告)日：1984-04-09

申请号：JP16798682

申请日：1982-09-25

Applicant: Fujitsu Ltd

Inventor： IIJIMA KOUJI ,  UOZUMI ITSUKAN

IPC: H04L12/43

CPC classification number: H04L12/43

Abstract: PURPOSE:To monitor data for communication between terminal stations for both transmission and reception at a central monitor station in the lump, by using a duplexed transmission line in loop data highway. CONSTITUTION:The loop data highway consists of a central monitor station CTE and plural terminal stations RTE1-RTEn and is connected in a loop by an existing (N) system line and a spare (E) system line. Each remote terminal station transmits transmission data to the duplexed lines N, E at the same time on a designated channel on a frame of time division multiplex. Each terminal station selects and receives the data of either line based on the command of the central monitor station CTE. A monitor station monitors both the N and the E system lines so as to monitor selectively the line of a designated channel having monitor requests, thereby monitoring the transmission/reception of the data of communication between terminal stations in the lump.

Abstract translation: 目的：通过在环路数据高速公路中使用双工传输线，监控中央监控站发送和接收终端之间通信的数据。 规定：环路数据通道由中央监控站CTE和多个终端站RTE1-RTEn组成，并通过现有的（N）系统线路和备用（E）系统线路循环连接。 每个远程终端站在时分复用帧上的指定信道上同时向双工线路N，E发送传输数据。 每个终端基于中央监控站CTE的命令来选择和接收任一行的数据。 监视站监视N和E系统线路，以便有选择地监视具有监视请求的指定频道的线路，从而监视在一体中的终端站之间的通信数据的发送/接收。

公开(公告)号：JPS59293A

公开(公告)日：1984-01-05

申请号：JP10958782

申请日：1982-06-25

Applicant: Fujitsu Ltd

Inventor： IIJIMA KOUJI ,  MORIKAWA HISASHI ,  EDA SUSUMU

IPC: H04Q11/04 ,  H04M9/02

CPC classification number: H04M9/025

Abstract: PURPOSE:To check a fault of each terminal station, by adding a send flag to a signaling data sent out to each terminal station from the center station. CONSTITUTION:A center station 3 and each terminal station 4-1-4-5 are connected to a present working circuit 1 and a stand-by circuit 2, by which a data highway is constituted. In case when a telephone set 5-2 of the terminal station 4-2 is called from a telephone set 5-1 of the terminal station 4-1, a dial signal from the telephone set 5-1 is converted to a signaling data S1 by the terminal station 4-1, is sent to a switchboard 7 through the present working circuit 1- the center station 3, the telephone set 5-2 is selected by the switchboard concerned 7, its calling signaling data S1 is transmitted to the center station 3, a send flag 10 is added by the center station, and thereafter, the telephone set 5-2 of the terminal station 4-2 is called. In case of a normal operation, a code of the send flag 10 is changed as to its code format by the opposite side terminal station 4-2 and is sent back to the center station 3. On the other hand, when the terminal station 4-2 is faulty, the fault is detected by the terminal station concerned, and input and output of the own station are bypassed. In this way, the send flag 10 is sent back as it is to the center station 3.

Abstract translation: 目的：通过向从中心站向每个终端发送的信令数据添加发送标志来检查每个终端站的故障。 构成：中心站3和终端站4-1-4-5连接到当前工作电路1和备用电路2，通过该备用电路构成数据通路。 在从终端站4-1的电话机5-1呼叫终端站4-2的电话机5-2的情况下，将来自电话机5-1的拨号信号转换为信令数据S1 由终端站4-1通过本工作电路1-中心站3发送到交换机7，电话机5-2由有关交换机7选择，其呼叫信令数据S1被发送到中心 站3，由中心站添加发送标志10，之后，呼叫终端站4-2的电话机5-2。 在正常操作的情况下，发送标志10的代码由对方终端站4-2改变其代码格式，并被发送回中心站3.另一方面，当终端站4 -2故障，故障由有关终端检测到，本台的输入输出被旁路。 以这种方式，将发送标志10按原样发送回中心站3。

公开(公告)号：JPS58170151A

公开(公告)日：1983-10-06

申请号：JP5194182

申请日：1982-03-30

Applicant: FUJITSU LTD

Inventor： IIJIMA KOUJI ,  MORIKAWA HISASHI ,  KOBAYASHI OSAMU

IPC: H04L12/437

Abstract: PURPOSE:To reduce the checking time, by transmitting loop-back commands to plural end offices from a master station to secure a loop-back connection and repeating the recovery to the loop-back connection for an end office that could receive the address information. CONSTITUTION:A receiving part 12 receives a loop-back command and then secures a loop-back connection in order to transmit the data received via a transmission line L1 to a transmission line L2 via a channel part 14, a transmitting part 13 and a gate G3. When the address information of all stations and loop- back commands are transmitted from a master station CTE, each end office is switched to a loop-back connection to transmit the address information and the response. In this case, the address information of an RTE1 closest to the CTE can be received at the CTE, and the address information given from other end offices are prevented by a gate G4 of a 1F part 11. The station CTE confirms the address of the RTE1 and then transmits a loop-back release command to the RTE1. Thus the RTE1 recovers the loop-back connection. Thus the address information given from an RTE2 is transferred to the CTE. Thereafter and in the same way, the end of checking is discriminated with the release of the loop-back connection of the last end office RTE4.

公开(公告)号：JPS58154949A

公开(公告)日：1983-09-14

申请号：JP3762982

申请日：1982-03-10

Applicant: FUJITSU LTD

Inventor： IIJIMA KOUJI ,  MATSUDA TAKASHI ,  UOZUMI ITSUKAN

IPC: H04L1/00

Abstract: PURPOSE:To obtain the code error display system possible for the simplicity of maintenance, by finding out the code error, managing collectively signals representing the presence of code error from a remote station or a central terminal station displaying error at the central terminal station device and clearing the display of the presence of code error automatically. CONSTITUTION:A remote terminal station device detects a parity error, and writes the address of the station itself to an address area 19 of the remote terminal station device in the format shown in a figure. A, writes the status, e.g., such as the use of transmission line of the in-use system or the spare system, writes the display of parity error generation in a parity error generating display area 21 and transmits the result to a central terminal station device. The display of parity error generation is performed in the station itself. In the central terminal station device, a serial-parallel converting section 11 converts signals into parallel signals via a transmission line interface section 10, the signal is received at a response signal register 12 and transmitted to an MPU18.

公开(公告)号：JPS58171151A

公开(公告)日：1983-10-07

申请号：JP5310082

申请日：1982-03-31

Applicant: FUJITSU LTD

Inventor： MATSUDA TAKASHI ,  HIROME MASASHI ,  EDA SUSUMU ,  IIJIMA KOUJI

IPC: H04L12/43

Abstract: PURPOSE:To simplify the change of a part to be connected in loop transmission, the change of a parameter, etc. by assigning a part to perform branching and insertion and a common bus line to transmit/receive signals to/from terminals to each node in a loop transmission system. CONSTITUTION:A transmission line interface 2 is continuously connected to a loop 1. A signal received by the transmission line interface 2 through a received data separating circuit 8, a selector 10 and a transmission data inserting circuit 9 is transmitted to the loop 1. The received data separating circuit 8 separates an address signal and data from a received TDM signal and impresses the separated signals to an address line ADD and a received data line RED of buses. A terminal reads out data coincident with the self-address. When a signal is to be sent from the terminal, a signal is outputted to a transmission request line RQS to switch the selector 10 and data are impressed to a transmission data line TRD, so that the transmission data are converted into a TDM by the inserting circuit 9 through the selector 10 and transmitted to the loop.