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.

2010/09/03

BORSCHT was heard after a long time.

I think that today's chief telecommunications engineer's examination grind goes by the material of the exchange. Well, it somewhat thinks the step improvement after installation technician's qualification is acquired to chief telecommunications engineer's qualification to be a problem of being easy to work though there is a material [ttetottsukiyasui] image of "Exchange" because it is related to the business that I am involved in the switchboard. Then, today's material is [kochira] ↓↓.



- About the BORSCHT function of a digital switchboard for the telephone in the subscriber circuit



“B" of the BORSCHT function is abbreviation of Battery feed, and the function to supply the direct current needed when the dial pulse of the supply of the telephone call current is received another.

These sentences are correct.
- B's of BORSCHT is none.
- B supplies the current.



“S" of the BORSCHT function is abbreviation of Signaling, and the function to send the dial-tone, the ringing tone, and the engaged tone, etc.

These sentences are wrong.
- The function that the call out and the response, etc. from the subscriber can be observed by observing the current that flows to the L1 line and the L2 line with the direct current watch circuit is called S(loop watch) function in the subscriber circuit of S(loop watch) digital telephone switchboard. For instance, it is judged that the telephone is an off hook more than the threshold with the harmony of the current of the L1 line and the L2 line it.
- S thinks that no Signaling and Supervision. 。。



As for “C" of the BORSCHT function, is it a modulator and in the abbreviation of Coder, analog that consists of the recovery machine?It is a function that converts it digitally.

These sentences are wrong.
- The function to convert the analogue signal and the digital signal is called C function in the BORSCHT function in the subscriber circuit of C(analog to digital conversion) and the digital telephone switchboard.
- The function to convert the analogue signal and the digital signal is called A/D mutual conversion function. - Because "C" analogue signal/converts a digital signal with Codec, I think it is amusing in "Modulation and recovery" (The modulation is speaking the amplitude, the frequency, and the pulse).



Well, how?It is a problem of B, S, and C in that though today's material was BORSCHT of the exchange. I think the installation technician's examination to be a familiar problem in the chief telecommunications engineer's being taken an examination because BORSCHT was a requiring problem before. ・・・ Then around here today

1 comment:

  1. This is a nice post that I find very useful. Thank you for sharing!

    ReplyDelete

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