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Ñòóäåíòàì > Äèïëîìíûå ðàáîòû > Êîììóòàòîð öèôðîâûõ êàíàëîâ ñèñòåìû ïåðåäà÷è

Êîììóòàòîð öèôðîâûõ êàíàëîâ ñèñòåìû ïåðåäà÷è

Ñòðàíèöà: 1/12

 

ÑÎÄÅÐÆÀÍÈÅ

ñòð.

ÂÂÅÄÅÍÈÅ                                                                                                                 1

 

ÃËÀÂÀ  1.  ÐÅØÅÍÈÅ  ÏÐÎÁËÅÌÛ  ÏÅÐÅÄÀ×È  ÈÍÔÎÐÌÀÖÈÈ  ÍÀ  ÏÐÈÌÅÐÅ  ÊÎÌÏÀÍÈÈ  «ÌÒÓ-ÈÍÔÎÐÌ»                                                          3

2.1    ÖÈÔÐÎÂÀß  ÒÐÀÍÑÏÎÐÒÍÀß  ÑÅÒÜ                                                         3

2.1.1    ÎÁÙÈÅ  ÑÂÅÄÅÍÈß                                                                               3

2.1.2    ÏÅÐÑÏÅÊÒÈÂÛ  ÐÀÇÂÈÒÈß                                                                 5

2.2    ÑÅÒÜ  ÏÅÐÅÄÀ×È  ÄÀÍÍÛÕ                                                                         7

2.2.1    ÎÁÙÈÅ  ÑÂÅÄÅÍÈß                                                                               7

2.2.2    ÏÅÐÑÏÅÊÒÈÂÛ  ÐÀÇÂÈÒÈß                                                                 8

2.2.3    ÒÅÕÍÎËÎÃÈß  ATM/FR                                                                          9

2.2.4    ÎÁÎÐÓÄÎÂÀÍÈÅ  ÑÅÒÈ                                                                        9

2.2.5    ÒÎÏÎËÎÃÈß  È  ÏÐÎÏÓÑÊÍÀß  ÑÏÎÑÎÁÍÎÑÒÜ  ÑÅÒÈ             10

2.2.6    ÄËß  ×ÅÃΠ È  ÊÀÊ  ÑÅÒÜ  ÌÎÆÅÒ  ÈÑÏÎËÜÇÎÂÀÒÜÑß  ÊËÈÅÍÒÀÌÈ                                                                                                        11

2.3    ÒÅËÅÔÎÍÍÀß  ÑÅÒÜ  ÎÁÙÅÃΠ ÏÎËÜÇÎÂÀÍÈß                                  12

2.3.1    ÎÁÙÈÅ  ÑÂÅÄÅÍÈß                                                                             12

2.3.2    ÏÅÐÑÏÅÊÒÈÂÛ  ÐÀÇÂÈÒÈß                                                               14

2.3.3    «ÈÍÒÅËËÅÊÒÓÀËÜÍÛÅ»  ÒÅËÅÔÎÍÍÛÅ  ÓÑËÓÃÈ                     14

2.3.4    ÒÅÕÍÎËÎÃÈß  «ÈÍÒÅËÅÊÒÓÀËÜÍÛÕ  ÓÑËÓû                            15

2.3.5    ÎÁÎÐÓÄÎÂÀÍÈÅ  ÑÅÒÈ                                                                       17

2.4    ÏÎÄÊËÞ×ÅÍÈÅ  Ê  ÑÅÒÈ  ÈÍÒÅÐÍÅÒ                                                   17

2.4.1    ÏÎÑÒÎßÍÍÎÅ  ÏÎÄÊËÞ×ÅÍÈÅ  Ê  ÓÑËÓÃÀÌ  ÈÍÒÅÐÍÅÒ  ÊÎÌÏÀÍÈÈ                                                                                            17

2.4.2    ÊÎÌÌÓÒÈÐÓÅÌÎÅ  ÏÎÄÊËÞ×ÅÍÈÅ  Ê  ÑÅÒÈ  ÈÍÒÅÐÍÅÒ      18

2.5    ÑÅÒÈ  ÍÅÄÀËÅÊÎÃΠ ÁÓÄÓÙÅÃΠ                                                           19

2.5.1    ÑÎÒÎÂÀß  ÐÀÄÈÎÒÅËÅÔÎÍÍÀß  ÑÅÒÜ  ÑÒÀÍÄÀÐÒÀ  CDMA     19

2.5.2    ÒÅÕÍÎËÎÃÈß  CDMA                                                                           19

2.5.3    ÏÅÐÑÏÅÊÒÈÂÛ  ÐÀÇÂÈÒÈß                                                               20

2.5.4    ÑÅÒÜ  ÁÅÑÏÐÎÂÎÄÍÎÃΠ ÒÅËÅÂÈÄÈÍÈß                                      20

 

ÃËÀÂÀ  2.  ÐÀÇÐÀÁÎÒÊÀ  ÑÒÐÓÊÒÓÐÍÎÉ  ÑÕÅÌÛ  ÓÑÒÐÎÉÑÒÂÀ              23

    3.1  ÑÐÀÂÍÅÍÈÅ  ÏÐÎÅÊÒÈÐÓÅÌÎÉ  ÑÈÑÒÅÌÛ  Ñ  ÖÈÔÐÎÂÎÉ  ÒÐÀÍÑÏÎÐÒÍÎÉ  ÑÅÒÜÞ  ÊÎÌÏÀÍÈÈ  «ÌÒÓ-ÈÍÔÎÐÌ»                           23

    3.2  ÐÀÑÑÌÎÒÐÅÍÈÅ  ÐÀÇËÈ×ÍÛÕ  ÂÀÐÈÀÍÒΠ ÏÎÑÒÐÎÅÍÈß  ÑÒÐÓÊÒÓÐÍÎÉ  ÑÕÅÌÛ                                                                                        23

 

ÃËÀÂÀ  3.  ÐÀÇÐÀÁÎÒÊÀ  ÔÓÍÊÖÈÎÍÀËÜÍÎ-ËÎÃÈ×ÅÑÊÎÉ  ÑÕÅÌÛ  ÁËÎÊΠ ÏÐÎÅÊÒÈÐÓÅÌÎÃΠ ÓÑÒÐÎÉÑÒÂÀ                                                  29

4.1    ÔÓÍÊÖÈÎÍÀËÜÍÀß  ÑÕÅÌÀ  ÁËÎÊÀ  ÂÛÄÅËÅÍÈß  ÖÈÊËÎÂÎÉ  È  ÑÂÅÐÕÖÈÊËÎÂÎÉ  ÑÈÍÕÐÎÍÈÇÀÖÈÈ                                                  29

4.2    ÔÓÍÊÖÈÎÍÀËÜÍÀß  ÑÕÅÌÀ  ÁËÎÊÀ  ÖÈÊËÎÂÎÃΠ ÂÛÐÀÂÍÈÂÀÍÈß  È  ÊÎÌÌÓÒÀÖÈÈ                                                                              35

 

 

 

4.2.1    ÔÓÍÊÖÈÎÍÀËÜÍÀß  ÑÕÅÌÀ  ÇÀÏÎÌÈÍÀÞÙÅÃΠ ÓÑÒÐÎÉÑÒÂÀ  ÊÎÌÌÓÒÀÖÈÈ                                                                               36

4.2.2    ÔÓÍÊÖÈÎÍÀËÜÍÀß  ÑÕÅÌÀ  ÇÀÏÎÌÈÍÀÞÙÅÃΠ ÓÑÒÐÎÉÑÒÂÀ  ÀÄÐÅÑÀ                                                                                            39

4.2.3    ÊÎÌÌÓÒÀÖÈÎÍÍÛÉ  ÝËÅÌÅÍÒ                                                      43

4.3    ÔÓÍÊÖÈÎÍÀËÜÍÀß  ÑÕÅÌÀ  ÁËÎÊÀ  ÔÎÐÌÈÐÎÂÀÍÈß  ÈÑÕÎÄßÙÈÕ  ÃÐÓÏÏÎÂÛÕ  ÊÀÍÀËΠ                                                                 43

 

ÃËÀÂÀ  4.  ÂÛÁÎÐÑÕÅÌÎÒÅÕÍÎËÎÃÈÈ  ÏÐÎÅÊÒÈÐÓÅÌÎÉ  ÁÈÑ            46

5.1          ÊÐÀÒÊÈÉ  ÎÁÇÎР ÑÓÙÅÑÒÂÓÞÙÈÕ  ÑÕÅÌÎ-ÒÅÕÍÎËÎÃÈÉ,  ÏÐÈÌÅÍßÅÌÛÕ    ÈÍÒÅÃÐÀËÜÍÛÕ  ÑÕÅÌÀÕ                                 46

5.1.1    ÒÅÕÍÎËÎÃÈß  ÒÒË                                                                               46

5.1.2    ÒÅÕÍÎËÎÃÈß  ÝÑË                                                                              47

5.1.3    ÒÅÕÍÎËÎÃÈß  NÌÄÏ                                                                           48

5.1.4    ÒÅÕÍÎËÎÃÈß  ÊÌÄÏ                                                                           48

5.2          ÂÛÁÎР ÑÕÅÌÎ-ÒÅÕÍÎËÎÃÈÈ  ÏÎÑÒÐÎÅÍÈß  ÁÈÑ                       50

5.3          ÑÕÅÌÛ  ÊÌÄÏ  Ñ  ÒÐÅÒÜÈÌ  ÑÎÑÒÎßÍÈÅÌ                                     50

 

ÃËÀÂÀ  5.  ÐÀÇÐÀÁÎÒÊÀ  ÏÐÈÍÖÈÏÈÀËÜÍÛÕ  ÝËÅÊÒÐÈ×ÅÑÊÈÕ  ÑÕÅÌ  ÁÀÇÎÂÛÕ  ß×ÅÅÊ  ÏÐÎÅÊÒÈÐÓÅÌÎÉ  ÇÀÊÀÇÍÎÉ  ÁÈÑ                               52

6.1    ß×ÅÉÊÀ  ÍÅ  (ÈÍÂÅÐÒÎÐ)                                                                          52

6.2    ß×ÅÉÊÀ  ÈËÈ-ÍÅ                                                                                         53

6.3    ß×ÅÉÊÀ  È-ÍÅ                                                                                               54

6.4    ÝËÅÌÅÍÒÛ  «È»  È  «ÈËÈ»                                                                        56

6.5    ß×ÅÉÊÀ  ÏÀÌßÒÈ                                                                                        56

 

ÃËÀÂÀ  6.  ÐÀÇÐÀÁÎÒÊÀ  ÏÐÈÍÖÈÏÈÀËÜÍÛÕ  ÑÕÅÌ  ÁËÎÊΠ ÏÐÎÅÊÒÈÐÓÅÌÎÉ  ÁÈÑ                                                                                                     59

7.1   ÐÀÇÐÀÁÎÒÊÀ  ÁÈÁËÈÎÒÅÊÈ  ÝËÅÌÅÍÒΠ                                           59

7.1.1    ÒÀÊÒÈÐÓÅÌÛÉ  D-ÒÐÈÃÃÅР                                                             59

7.1.2    Ñ×ÅÒ×ÈÊÈ                                                                                             60

7.1.3    ÄÅØÈÔÐÀÒÎÐÛ                                                                                    62

7.1.4    ÌÓËÜÒÈÏËÅÊÑÎР                                                                               63

7.2  ÐÀÇÐÀÁÎÒÊÀ  ÏÐÈÍÖÈÏÈÀËÜÍÛÕ  ÑÕÅÌ  ÁËÎÊΠ ÏÐÎÅÊÒÈÐÓÅÌÎÉ  ÁÈÑ                                                                                                         64

7.2.1    ÐÀÇÐÀÁÎÒÊÀ  ÏÐÈÍÖÈÏÈÀËÜÍÎÉ  ÑÕÅÌÛ  ÁËÎÊÀ  ÏÐÈÅÌÍÈÊÀ  ÖÈÊËÎÂÎÃΠ È  ÑÂÅÐÕÖÈÊËÎÂÎÃΠ ÑÈÍÕÐÎÍÈÇÌÀ  64

7.2.2    ÐÀÇÐÀÁÎÒÊÀ  ÏÐÈÍÖÈÏÈÀËÜÍÎÉ  ÑÕÅÌÛ  ÊÎÌÌÓÒÀÖÈÎÍÍÎÃΠ ÝËÅÌÅÍÒÀ                                                                                 65

7.2.3    ÐÀÇÐÀÁÎÒÊÀ  ÏÐÈÍÖÈÏÈÀËÜÍÎÉ  ÑÕÅÌÛ  ÁËÎÊÀ  ÔÎÐÌÈÐÎÂÀÍÈß  ÈÑÕÎÄßÙÈÕ  ÊÀÍÀËΠ                                               67

 

ÃËÀÂÀ  7.  ÊÎÍÑÒÐÓÊÒÈÂÍÛÅ  ÎÑÎÁÅÍÍÎÑÒÈ  ÏÐÎÅÊÒÈÐÓÅÌÎÃΠ ÓÑÒÐÎÉÑÒÂÀ                                                                                                            69

8.1    ÂÂÅÄÅÍÈÅ                                                                                                      69

8.1.1    ÎÑÍÎÂÍÛÅ ÒÅÕÍÈ×ÅÑÊÈÅ ÕÀÐÀÊÒÅÐÈÑÒÈÊÈ ÊÐÈÑÒÀËËÀ 69

 

 

8.1.2    ÍÀÇÍÀ×ÅÍÈÅ  ÂÛÂÎÄΠ ÌÈÊÐÎÑÕÅÌÛ                                     69

8.2    ÝËÅÌÅÍÒÛ  ÒÎÏÎËÎÃÈÈ                                                                         71

8.2.1    ÊÎÍÑÒÐÓÊÒÈÂÍÎ – ÒÅÕÍÎËÎÃÈ×ÅÑÊÈÅ  ÎÃÐÀÍÈ×ÅÍÈß     71

8.2.2    ÏÐÈÌÅР ÒÎÏÎËÎÃÈÈ  ÂÛÏÎËÍÅÍÍÎÉ  Ñ  Ó×ÅÒÎÌ  ÍÎÐÌ  ÊÎÍÑÒÐÓÊÒÈÂÍÎ – ÒÅÕÍÎËÎÃÈ×ÅÑÊÈÕ  ÎÃÐÀÍÈ×ÅÍÈÉ     72

 

ÃËÀÂÀ  8.  ÌÅÐÎÏÐÈßÒÈß  ÏΠ ÎÕÐÀÍÅ  ÒÐÓÄÀ  ÏÐÈ  ÐÀÁÎÒÅ  Ñ  ÝÂÌ  ÏÐÈ  ÐÀÇÐÀÁÎÒÊÅ  ÒÎÏÎËÎÃÈÈ  ÁÀÇÎÂÛÕ  ß×ÅÅÊ  ÝËÅÌÅÍÒΠ ÏÐÎÅÊÒÈÐÓÅÌÎÉ  ÁÈÑ                                                                                                74

9.1    ÏÐÅÄÈÑËÎÂÈÅ                                                                                             74

9.2    ÄÈÑÏËÅÉ  -  ÐÈÑÊ  ÄËß  ÇÄÎÐÎÂÜß                                                       74

9.3    ÝËÅÊÒÐÎÌÀÃÍÈÒÍÛÅ  ÏÎËß  È  ÈÇËÓ×ÅÍÈß                                   77

9.4    ÇÐÅÍÈÅ  È  ÊÎÌÏÜÞÒÅР                                                                          77

9.4.1.    ÀÍÀÒÎÌÈß  ÃËÀÇÀ                                                                              78

9.4.2.    ÔÎÐÌÈÐÎÂÀÍÈÅ  ÈÇÎÁÐÀÆÅÍÈß  ÍÀ  ÝÊÐÀÍÅ  ÄÈÑÏËÅß    78

9.5    ÁÎËÅÇÍÈ,  ÂÛÇÂÀÍÍÛÅ  ÒÐÀÂÌÎÉ  ÏÎÂÒÎÐßÞÙÈÕÑß  ÍÀÃÐÓÇÎÊ                                                                                                                   80

9.6    ÐÀÁÎÒÀ  Ó  ÄÈÑÏËÅß  È  ÏÓÒÈ  ÅÅ  ÎÏÒÈÌÈÇÀÖÈÈ  (ÂÈÄÅÎÝÐÃÎÍÎÌÈÊÀ)                                                                                                  82

9.7    ÌÅÁÅËÜ  ÄËß  ÎÏÅÐÀÒÎÐΠ  ÊÎÌÏÜÞÒÅÐΠ                                  84

9.8    ÇÀÊËÞ×ÅÍÈÅ                                                                                               84

 

ÃËÀÂÀ  9.  ÒÅÕÍÈÊÎ – ÝÊÎÍÎÌÈ×ÅÑÊÎÅ  ÎÁÎÑÍÎÂÀÍÈÅ  ÐÀÇÐÀÁÎÒÊÈ  ÁÈÑ  ÊÎÌÌÓÒÀÒÎÐÀ  ÖÈÔÐÎÂÛÕ  ÊÀÍÀËΠ ÑÈÑÒÅÌÛ  ÏÅÐÅÄÀ×È    86

10.1    ÎÁÎÑÍÎÂÀÍÈÅ  ÂÛÁÎÐÀ  ÇÀÊÀÇÍÎÉ  ÁÈÑ                                        86

10.2    ÎÁÎÑÍÎÂÀÍÈÅ  ÂÛÁÎÐÀ  ÑÒÐÓÊÒÓÐÍÎÉ  ÑÕÅÌÛ                         86

10.3    ÎÁÎÑÍÎÂÀÍÈÅ  ÂÛÁÎÐÀ  ÒÅÕÍÎËÎÃÈÈ  ÏÎÑÒÐÎÅÍÈß  ÁÈÑ     87

10.4    ÐÀÑ×ÅÒ  ÎÑÍÎÂÍÛÕ  ÒÅÕÍÈÊÎ – ÝÊÎÍÎÌÈ×ÅÑÊÈÕ  ÏÎÊÀÇÀÒÅËÅÉ                                                                                                           93

10.4.1      ÐÀÑ×ÅÒ  ÏÎÊÀÇÀÒÅËÅÉ  ÍÀÄÅÆÍÎÑÒÈ                                      93

10.4.2      ÐÀÑ×ÅÒ  ÑÅÁÅÑÒÎÈÌÎÑÒÈ  ÈÇÃÎÒÎÂËÅÍÈß  ÁÈÑ                  93

10.5    ÂÛÂÎÄÛ                                                                                                       95

 

ÃËÀÂÀ  10.  ÏÀÒÅÍÒÍÛÅ  ÈÑÑËÅÄÎÂÀÍÈß                                                     96

 

ÇÀÊËÞ×ÅÍÈÅ                                                                                                      100

 

ÏÐÈÌÅ×ÀÍÈÅ                                                                                                      100

 

ÑÏÈÑÎÊ  ÈÑÏÎËÜÇÎÂÀÍÍÛÕ  ÑÎÊÐÀÙÅÍÈÉ                                        101

 

ÑÏÈÑÎÊ  ÈÑÏÎËÜÇÎÂÀÍÍÛÕ  ÈÑÒÎ×ÍÈÊΠ                                        103

 

ÂÂÅÄÅÍÈÅ

 

 Â  íàñòîÿùåå âðåìÿ â Ðîññèè, êàê è âî âñåì ìèðå íàáëþäàåòñÿ èíôîðìàöèîííûé áóì è îáúåì èíôîðìàöèè, ïåðåäàâàåìîé ïî êîììóòèðóåìûì  (â òîì  ÷èñëå  è  òåëåôîííûì )  êàíàëàì  ñâÿçè,  ñèëüíî âîçðàñòàåò  è,  ïîýòîìó,  âîçíèêàåò  íåîáõîäèìîñòü  â  êîììóòàöèîííîì  îáîðóäîâàíèè,  êîòîðîå  îáåñïå÷èâàëî  áûñòðîå  è  êà÷åñòâåííîå  ñîåäèíåíèå  àáîíåíòîâ  è  ñîîòâåòñòâîâàëî  áû  ñîâðåìåííûì  ñòàíäàðòàì  íà  êîììóòàöèþ  öèôðîâûõ  êàíàëîâ  ïåðåäà÷è.

  íà÷àëå  ïðîøëîãî  ãîäà  (14.01.97)  Ìèíèñòåðñòâîì  Ñâÿçè  áûë  èçäàí  ïðèêàç  «Î  ìåðàõ  ïî  çàùèòå  èíòåðåñîâ  ðîññèéñêèõ  ïðîèçâîäèòåëåé  òåëåêîììóíèêàöèîííîãî  îáîðóäîâàíèÿ»,  â  ïåðâîì  ïóíêòå  êîòîðîãî  ãîâîðèòñÿ:  «Ïðåäïðèÿòèÿì  ñâÿçè  íà  ñåòè  îáùåñòâåííîãî  ïîëüçîâàíèÿ ïðåèìóùåñòâåííî  ïðèìåíÿòü  êîììóòàöèîííîå  îáîðóäîâàíèå  îòå÷åñòâåííîãî  ïðîèçâîäñòâà,  â  òîì  ÷èñëå  è  ïðîèçâîäèìûõ  íà  ñîâìåñòíûõ  ïðåäïðèÿòèÿõ»[1].

Ñåé÷àñ ôèðìû-ïðîèçâîäèòåëè âåäóò øèðîêèå  èññëåäîâàòåëüñêèå  è  îïûòíî-êîíñòðóêòîðñêèå  ðàáîòû  ïî  ñîçäàíèþ  ýëåêòðîííûõ  ñèñòåì  êîììóòàöèè  äëÿ  ïåðåäà÷è  òåëåôîííîé  è  òåëåãðàôíîé  èíôîðìàöèè,  äàííûõ  è  òàê  äàëåå  â  ýëåêòðîííûõ  àâòîìàòè÷åñêèõ  òåëåôîííûõ  ñòàíöèÿõ  ñ  âðåìåííûì  ðàçäåëåíèåì  êàíàëîâ,  ÷òî ïîçâîëÿåò  îäíîâðåìåííî  óñòðàèâàòü  íåñêîëüêî  ñîåäèíåíèé  ÷åðåç  îäèí  è  òîò  æå  êîììóòàöèîííûé  ýëåìåíò.  Ýòî  ïðèâîäèò  ê  ïîâûøåíèþ  èñïîëüçîâàíèÿ  îáîðóäîâàíèÿ  êîììóòàöèîííîãî  ïîëÿ,  à,  ñëåäîâàòåëüíî,  ê  óëó÷øåíèþ  ýêîíîìè÷åñêèõ  ïîêàçàòåëåé  ïðè  ñîõðàíåíèè  òðåáóåìîãî  êà÷åñòâà  ïåðåäà÷è  èíôîðìàöèè.  Ýëåêòðîííûå  àâòîìàòè÷åñêèå  òåëåôîííûå  ñòàíöèè  ñ  öèôðîâûì  êîììóòàöèîííûì  ïîëåì,  ïîñòðîåííûå  ïî  ïðèíöèïó  ïðåîáðàçîâàíèÿ  ñèãíàëîâ  â  ôîðìå  èìïóëüñíî-êîäîâîé  ìîäóëÿöèè  (ÈÊÌ),  ÿâëÿþòñÿ  îñíîâîé  äëÿ  îðãàíèçàöèè  èíòåãðàëüíûõ  öèôðîâûõ  ñåòåé  ñâÿçè.  Òî  åñòü  ñèñòåì  êîììóòàöèè,  â  êîòîðûõ  àïïàðàòóðà  êîììóòàöèè  è  ïåðåäà÷è  âûïîëíåíà  íà  åäèíûõ  ïðèíöèïàõ  è  åäèíîé  ýëåìåíòíîé  áàçå,  à  âñå  âèäû  èíôîðìàöèè  ïåðåäàþòñÿ  ïî  ñåòè  â  åäèíîé  öèôðîâîé  ôîðìå.

  íàñòîÿùåå  âðåìÿ  âñå  áîëåå  øèðîêîå  ðàñïðîñòðàíåíèå  ïîëó÷àþò  öèôðîâûå  ñåòè  ïîñòðîåííûå  ïî  êîëüöåâîìó  ïðèíöèïó,  ãäå  ïåðåäà÷à  èíôîðìàöèè  ïðîèñõîäèò  â  îäíîì  íàïðàâëåíèè  ýòî  ïîçâîëÿåò  ñîêðàòèòü  çàòðàòû  íà  ïðîêëàäêó  ìàãèñòðàëüíûõ  êàáåëåé  è  ïðåäîñòàâëÿåò  âîçìîæíîñòü  íàðàùèâàíèÿ  ñåòåé, à  òàêæå  îáúåäèíåíèå  íåñêîëüêèõ  íèçêîñêîðîñòíûõ  ïîòîêîâ  â  îäèí  âûñîêîñêîðîñòíîé.  Ïðèìåðîì  äåéñòâóþùåé  â  íàñòîÿùåå  âðåìÿ  êîëüöåâîé  ñåòè  ïîñòðîåííîé  ïî  ïðèíöèïó  Ñèíõðîííîé  Öèôðîâîé  Èåðàðõèè  ìîæåò  ñëóæèòü  ñåòü  êîìïàíèè  «ÌÒÓ-Èíôîðì»,  áîëåå  ïîäðîáíî  îñîáåííîñòè  ôóíêöèîíèðîâàíèÿ  ýòîé  ñåòè  ðàññìîòðåíû  â  ãëàâå  1.