Chief Transmission and Switching Engineer(JP

Let's do study and measures of "Telecommunication chief engineer examination" where a good teaching material doesn't exist though the examination contents is advanced little by little.

2010/08/29

Because of the transmission exchange telecommunication chief engineer

Well, I think that the knowledge of "Transmission" or "Exchange" is still important because of the transmission exchange telecommunication chief engineer though the chief telecommunications engineer is studied as usual today. The material of the switchboard system is published today because of saying. Then, today's material is ↓↓.



- Digital switchboard for telephone



In the software of a digital switchboard for the telephone, priority is set to each program to execute various processing efficiently, and the execution control form corresponding to the character is taken in real time.

- The software of a digital switchboard sets priority to the program, and takes the execution control form corresponding to the character in real time.



【 emergency 】The one to interrupt processing even if there is a program under execution, and to execute the breakdown processing, and as for the level control, information on the processing of the program that interrupts while executing it is saved in a specific memory area, and, besides, will wait for the restart of processing when 【 abnormality 】 of the system like the breakdown etc. is detected.

- Information on the processing of the program that interrupts while interrupting processing even if there is a program under execution, executing the breakdown processing, and executing it is saved in a specific memory area, and, besides, waits for the restart of processing when 【 abnormality 】 of the system like 【 emergency 】 level control = breakdown etc. is detected.



The clock level control in real time secures the character for 【 periodic 】 by starting the program in the form that controls the program that needs accurate timing.

- The character is in real time secured for 【 periodic 】 by starting the program in the form that controls the program that needs timing clock level control = accurate.



Base..level..control..in real time..character..restriction..gradual..program..control..form..service..analysis..processing..number..translation..processing..system..very..need..call processing program..maintenance..operation..related to..program..start..use.

- When it is a form that controls the program that the restriction of the character is base level control = in real time gradual, and the call processing program that doesn't need the system between very much and the program related to the maintenance operation is started, it uses it.



It asks and one [no] has been published up to now in the past how many days it, and which sentences are mistakes, and is it correct or does : by the memory point?It is "Fill-in-the-blank question" this time though publishesThe part of left 【XXX】 is actually set as making up in the past and because it is a thing, it takes care. The part that shows a loss on the right side classifies the part that I felt personal "It is important", and refer, please. Then, the following : the material that judges the corrections of sentences please up to now.



- Start of program in base level control



The program that controls the start of each program in what order it is necessary to start the program of the base level is called a driving management program.

These sentences are wrong.
- It is composed that it is an operating sushi stem (execution management) in which order that manages the schedule whether start by the program, it calls, confronts the program group that corresponds respectively in each division [sareta] [yoshori] and which timing of these [ni] ..the arbitrary occurrence.., and so as not to ruin it, a real-time character is devised.
- is division, and no "Driving management program. " perhaps. "Executive control program"



When all the processing of the program at the clock level ends, the program at the base level is started.

These sentences are correct.
- Naturally, after all the processing of the clock level ends, the processing of the base level is executed. 。。



The program at the base level is executed in the specification order by succession from the program of the clock level.

These sentences are wrong.
- Work at the clock level that it is interrupted at each constant period (The example: 8ms) and the emergency degree is high is made to intervene it though central controller (CC:Central Control) that works and controls the switchboard with software is usually working at a gradual base level of the time restriction. This is called a clock interruption. A central controller moves at the base level when all work at the clock level ends and is processing work. The result is brought together on the way of work when the constant period passes before work at the base level ends and the work that interrupts at the base level at the next cycle is drawn out after it interrupts, and it works at the clock level and it restarts.
- Program of clock level is made to interrupt by priority, and because only work at base level is restarted when everything is ended when it ends all by processing work at clock level, and "Succession from clock level" is not done separately during base level work though cannot it able not to have been so significant and to know sentences aboveIt is "The work that I was interrupting is succeeded. " if it dares to say.



Well, it is a topic of the switchboard this time. It is not a problem of worrying so much when the priority level at the clock level and the base level is neatly understood. How what is as of now though the rate of setting questions of the problem of the operating system of such a switchboard was high in old times?Because it is "Transmission exchange telecommunication chief engineer" as said even at the beginning still, I will remember as one respondent knowledge though I cannot say indescribably because the problem collection in recent years doesn't look over at all. Then, around here today.

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