Telephony chap 1

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TelephonyTelephony

Nguyn Duy Nht Vin


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Ti liu tham khoTi liu tham kho

DGPT-GSIC, General Introduction of TelehonyTheory!, "##2$

%G , Infor&ation ' Co&&unication, %td$ General

Introduction of Teleco&&uncation Theory!, "##2$ ($)$ *ed&ill and +$*$ Valdar, SPC Digital Telehonechange.!, "##/$

0illia& Stalling., Data and Co&uterCo&&unication!, 2//2$

ri..on, Teleco&&unication!, "##1$ *onayne, )$, Digital Co&&unication Sitching!, "#34$ S$ 0elch, Signalling in Teleco&&unication. Netor5!,


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ContentsContents

Chater "789er9ieChater 27Su:.cri:er %ine and Digital Trun5

in the Telehone Netor5Chater 67 Digital Sitching in changeChater ;7 Signalling in Telehony

Chater 17 Sy.te& Control
http://telephony2.ppt/http://telephony3.ppt/http://telephony4.ppt/http://telephony5.ppt/http://telephony5.ppt/http://telephony4.ppt/http://telephony3.ppt/http://telephony2.ppt/


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Chapter 1Chapter 1

89er9ie


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Lch s pht trinLch s pht trin

Nhu ci th?ng tin c@a con ngABi 9cc hE thFng th?ng tin& thanh %Ha hJi ChK 9iLt

Nhu ci th?ng tin :Mng tiLng nJiua 5hoOng cch ngy cng tng$


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Pht triQn c?ng nghE "36R7 Sa&uel ($ or.e ht &inh ra &y =iEn

tUn, truyn =AWc tUn hiEu =i rXt a, nhAng 5hJ nhY$ "3R47 +lecander Graha& ell ht &inh ra &y

=iEn thoZi$ "3R37 T>ng =i =ng =i "33#7 +$ Stroger ht &inh ra t>ng =i t_ =`ng\ an.a.$ Th_c hiEn cu`c gi theo tbng :AYc$


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"#24, ri..on ht triQn thnh c?ng hE t>ng =i thanh cho "#41, t>ng =i SS .F " c@a l t>ng =i =iEn tH cJ dung

lAWng lYn theo nguy[n tc SPC$ ell Sy.te& %a:oratory hon thiEn t>ng =i .F chuyQn

tiL 9o =ng =i$

Thng " n& "#R4, t>ng =i =iEn tH .F chuyQn tiL tr[n ck .\chuyQn &Zch .F &y tUnh thAkng &Zi =


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Mng chuyn mch in thoiMng chuyn mch in thoic!ng c"ng #$T%c!ng c"ng #$T%

PSTN Pu:lic Sitch Telehone Netor5$y d_ng tr[n ck .\ chuyQn &Zch 5[nh$

Cung cX tFc =` 4;5:. cho 5Lt nFi giKa ccthu[ :ao$]at =`ng tr[n hAkng thpc nFi 5Lt cJ

hAYng, :ao gq& 6 giai =oZn7 ThiLt l nFi 5Lt Duy tr nFi 5Lt GiOi hJng 9 hsc hqi nFi 5Lt


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Cc thnh ph&n c' (n c)aCc thnh ph&n c' (n c)a#$T%#$T%

T>ng =i n`i hZtnd 8ffice

T>ng =i u giangTande&

Telehone

T>ng =i n`i hZtnd 8ffice

T>ng =i u giangTande&Trung 5L

Trun5

Thu[ :aoSu:.cri:er

Zch 9^ng thu[ :ao

%ocal %oo


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Thu[ :ao ChuyQn =>i tUn hiEu thn thu`c 9Yi con ngABi

thnh tUn hiEu thUch hW cJ thQ truyn ua &Zng$ Telehone, (ac.i&ile, PC

Zch 9^ng thu[ :ao %i[n 5Lt giKa thu[ :ao 9 &Zng Cung cX hAkng tiEn truyn tOi tUn hiEu thoZi,

:o hiEu, nguqn giKa &Zng 9 thu[ :ao$


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Page ""


Node chuyQn &Zch t>ng =i ThiLt l nFi 5Lt cho cc cu`c gi theo y[u cng =i chuyQn tiL tran.it, tande&, toll office nFi cc

t>ng =i 9Yi nhau$ T>ng =i n`i hZt %ocal change, nd 8ffice, Center

8ffice7 t>ng =i nFi tr_c tiL 9Yi thu[ :ao Trung 5L

PhAkng tiEn truyn djn giKa hai t>ng =i


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Cc ph*'ng php t+ ch,cCc ph*'ng php t+ ch,cmngmng

Zng lAYi &e.h7 Cc t>ng =i l cc t>ng

=i n`i hZt %7 %ocalchange, ngang cX$

Cc t>ng =i nFi nhautbng =?i &`t :\i cctrung 5L$

S_ trao =>i th?ng tingiKa hai thu[ :ao thu`chai t>ng =i l tr_c tiL

SF =ABng dy trung 5LlYn

%

%

%

% %

t

tt


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Zng .ao .tar7 Zng hn cX T>ng =i chuyQn tiL T

Toll change cX cao$ Cc t>ng =i n`i hZt %

cX thX$ Cc cu`c gi c@a hai

thu[ :ao thu`c hai %

hOi ua T SF trung 5L Ut nhXt [u c


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Zng hvn hW Lt hW giKa &Zng .ao 9 &Zng lAYi Phn thnh cc cX 5hc nhau theo nhu

c


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PSTN c@a &`t uFc iati[u :iQu IT7 International Tran.it

change NT7 National Tran.it

change$ %T7 %ocal Tran.it change$ P+7 Pri9ate +uto ranch

change$ *SS7 *e&ote Su:.cri:er

Sy.te&$

NT

%T

%

*SSP+

NT

%T

%

IT

$$$

$$$

$$$


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- th.ng gh/p k0nh phn chia- th.ng gh/p k0nh phn chiatheo th2i gian #CM3T4Mtheo th2i gian #CM3T4M

sc =Uch7 Tng dung lAWng c@a hE thFng

GiOi h7 Gh 5[nh Gh 5[nh hn chia theo t


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Gh 5[nh hn chia theo t


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Gh 5[nh hn chia theo thBi gian PC vi 5[nh =AWc Xn =nh &`t 5hoOng thBi gian =Q

truyn &`t &ju tiLng nJi =| &| hJa gi l 5he

thBi gian TS Ti&e Slot Ng} ra c@a :` gh 5[nh cJ tFc =` :Mng .F 5[nh

~ tFc =` &vi 5[nh$ :[n thu, tUn hiEu =AWc tch ra trong tbng

5hoOng thBi gian tAkng png cho &vi 5[nh$ hO nng =Zt dung lAWng lYn$ Thun tiEn =Fi 9Yi tUn hiEu .F, cs thQ l PC$


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ncoder

ncoder

ncoder

ziu 5hiQn lXy &ju

hoOng thBi gian lXy &ju%c th?ng thX

%Xy &ju

/$6-6$;5]{

hung

he thBi gian


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$' 5 kh.i ch,c n6ng t+ng i$' 5 kh.i ch,c n6ng t+ng i$#C$#C


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$' 5 kh.i ch,c n6ng t+ng i$' 5 kh.i ch,c n6ng t+ng is. $#Cs. $#C

Giao tiL thu[ :ao Gq& &Zch =iEn =ABng dy 9 :` t trung$

Zch =iEn =ABng dy th_c hiEn cc chpc nng 8*SC]T$

hFi t trung thu[ :ao l& nhiE& 9s t trung tOi thnh&`t nhJ& thu[ :ao trAYc 5hi 9o trABng chuyQn &Zch$

Giao tiL trung 5L zO& nhn cc chpc nng G+P+C]8$

h?ng th_c hiEn chpc nng t trung tOi nhA giao tiL thu[:ao nhAng 9jn cJ :` t trung =Q trao =>i 5he thBi gian,cn :Mng tOi, tr`n :o hiEu 9 tUn hiEu &ju =Q thH


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TrABng chuyQn &Zch 7 Chpc nng chuyQn &Zch7 ThiLt l tuyLn nFi giKa hai hay

nhiu thu[ :ao c@a t>ng =i hay giKa cc t>ng =i 9Yinhau$

Chpc nng truyn djn7 Truyn djn tUn hiEu tiLng nJi 9 cctUn hiEu :o hiEu giKa cc thu[ :ao 9 giKa cc t>ng =i9Yi y[u cng =i hOi cJ chpc nng nhn, H l, ht th?ng

tin :o hiEu =Ln nki thUch hW


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ziu 5hiQn t>ng =i7 Gq& :` H l trung t& 9 cc :` nhY$ Th_c hiEn cc

chpc nng .au7 H l cu`c gi 7 wut trZng thi thu[ :ao, trung 5L nhn

ung uay .F 9 giOi &| ung uay .F t& =ABng rvitruyn :o hiEu 5Lt nFi giOi toO cu`c gi tUnh cAYc$$$$ COnh :o7 T_ thH, ht hiEn lvi hng =i


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ziu hnh, 5hai thc 9 :Oo dAng 7 zQ .H dsng t>ng =i &`t cch cJ hiEu uO, cJ 5hO nng

ht triQn cc dch 9s &Yi, hFi hW .H dsng cc hAkngthpc d dng trong t>ng =i$

Gi& .t 5iQ& tra cc h

Telephony chap 1

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