Digital switchboard for telephone.

I think that I go with the switchboard today though the material of "Switchboard system" continues recently. Well, this material is not judgment [surutteyatsu], and a fill-in-the-blank question as for the corrections of usual sentences. From from among choices Part of 【XXX】 originally becomes hole becoming empty, and to doing word choice and ..[] that buries hole.. problem of typeWell, if a right memo can be read after left sentences are comfortably read, it is thought ････ therefore. Then, today's material is ↓↓.



- Digital switchboard for telephone


A digital switchboard for the telephone should maintain high reliability for a long time, and provide steady service continuously.
- Well, the switchboard is an expensive shopping and it doesn't become work if use for a long term, and not dependable.




In a digital switchboard for the telephone, processing (breakdown processing) that gives the breakdown measures to hardware and each software, detects the state promptly in abnormal circumstances, and does again normally has been achieved.
- The breakdown measures are given to each hardware software.




As for the breakdown processing, it is demanded that it is necessary to deal with all the system malfunctions effectively, it is necessary to process 【 in short course 】 extremely, and the incompleteness of the breakdown processing be concise, certain processing [houhou] because it becomes a fatal defect of the system.
- It is necessary to deal with the point and all the system malfunctions of the breakdown processing effectively. - It is necessary to process 【 in short course 】 extremely. - The incompleteness of the breakdown processing becomes a fatal defect of the system. - It is demanded that it be concise, certain processing [houhou].



Abnormality of the common control unit such as processors installs an abnormal detecting function in hardware as one of the failure detection techniques with hardware because the influence that it has on the system is large, and there is a method of starting the breakdown processing program stored in a fixed house number with 【 interrupt 】 circuit when abnormally detecting it.
- When * abnormality with a large influence that it has on the system is detected, abnormality of the common control unit such as processors starts the breakdown processing program stored in a fixed house number with 【 interrupt 】 circuit.



Moreover, there is a method of observing whether to fall in check on 【It is periodic 】, and 【 infinite loop 】(Processing circulates to the same program, and the control is not transferred to another program) the control of the clock level and the base level as one of the fault detections with software.
- 【It is periodic 】 ..control of the clock level and the base level.. is checked.
- 【 infinite loop 】 Processing circulates to = same program, and the control is not transferred to another program.



･･･It is [maa;konna] [kanji]. Left sentences take notes of the desire of one only of simple question and division in the cell by each [wo] punctuation in the past, and no "Point" to it it for right sentences should. Does a person not good only have to be able to help the remembrance of the movement of the switchboard even a little?Then, around here today