China for of all kinds engineer communication foundation interview inscribes lib
From;    Author:Stand originally

China for interview of of all kinds engineer: Telegraphic ABC inscribes a library(the following title can press fill a vacancy, judgement or brief answer kind gives a title, also can become a choice to inscribe through change)


1, in process of speech signal digitlization, use quantify methodological dispute equably yes.

2, in PCM30/32 route system, the time-interval of every code is 488ns.

3, in PCM30/32 route system, TS0 is used at signal of deferent frame synchronization, TS16 is used at letter of deferent telephone channel to make.

4, in PCM30/32 route system, the repetition of multi-frame frequency is 500HZ, cycle is 2ms.

5, the hardware of programmed control switching equipment can be divided for telephone channel system and central control system two parts, the control software of whole switching equipment is put in the memory that controls a system.

6, general the wavelengh of 0 chromatic dispersion with 2 oxidation fiber-optic silicon is controlled in 1310nm, and loss most bit is controlled in 1550nm wavelengh.

7, G.652 is fiber-optic it is wavelengh of 0 chromatic dispersion the single standard in 1310nm is fiber-optic.

8, the basic structure of cable by cable core, strengthen component and jacket composition.

9, commonly used cable configuration has a cable that wring type, bundle cable of type of Guan Shiguang cable, framework and banding type cable.

10, attack in the develop of meshy net in the structure, n node interrelates completely need N (N-1) / 2 transmission line.

11, attack in the develop of star net in the structure, n node interrelates completely need N-1 transmission line.

12, ATM technology is circuit trade technology and the union that exchange a technology in group.

13, release according to 98 years " automatic exchange phone (number) net technology system of organization " , our country telephone network cent is 3 class.

14, the telephone network system with new ground, cent of our country toll telephone network is 2 class.

15, when telephone network entire network is 3 class, number is string of the oldest a section of a highway or railway receiving report between two end bureau 5 paragraphs, string receive commutative center to be 6 at most.

16, road of the one monitor in new system exchanges a center (DC1) for the province (municipality, municipality directly under the Central Government) long-distance trade center, its function basically is to collect receive a place to save (municipality, municipality directly under the Central Government) province border is long-distance will go the Wu of long-distance terminal word of word Wu and seat of center of one class trade.

17, one monitor road exchanges a center (DC1) between with backbone road by meshy be linked together.

18, flow to according to word Wu discharge, 2 monitor road exchanges a center (DC2) also can exchange central DC1 to build nonstop circuit with the one monitor road with appurtenant blame group.
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