Tong Quan Ve Cong Nghe Vien Thong In
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8/9/2019 Tong Quan Ve Cong Nghe Vien Thong In
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PTTC2 - Bi dng kin thc c bn v vin thng
Gio vin:ng Quc Anh - www.dangquocanh.com 1
1
KHI NIM V VIN THNG
PTTC2
PTTC2
www.dangquocanh.com2
Tng quan v vin thng
T chc: PTTC2 Gio vinng Quc Anh, thc sin t Vin
thng, T: (84)(90)394-5504, Email:[email protected], Website:
www.dangquocanh.com Thi gian: 4 ngy (20 thng 7 ti 23 thng 7 nm
2010) Sng: 5 tit t 8:00 ti 12:00 Chiu: 5 tit t 13:30 ti 17:30
PTTC2
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Certificates
PTTC2
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Cc lp ngn hn thc hin
1. 12/2000: xDSL cho SACOM (40)2. 6/2001: Cng ngh DSL ti PTTC2 cho bu in
cc tnh (80)3. 6/2002: Cng ngh DSL ti PTTC2 cho bu in
cc tnh (50)
4. 6/2002: Cng ngh DSL ti PTTC2 cho bu intp. HCM (60)5. 10/2002: ADSL thc tin, gii php v trin khai
trn mng TTX ISDN (100)6. 12/2002: ADSL thc tin, gii php v trin khai
trn mng TTX ISDN (260)
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PTTC2 - Bi dng kin thc c bn v vin thng
Gio vin:ng Quc Anh - www.dangquocanh.com 2
PTTC2
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Mt vi hnh nh
PTTC2
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Cc lp ngn hn thc hin
7. 1/2003: K thut v mng ADSL theo d n caVNPT cho Bnh Dng v ng Nai (20)
8. 3/2003: Dch v ADSL cho bu in ng Nai (50)9. 6/2003: K thut ADSL theo d n ca VNPT: K2,
K3, K4 (210)
10. 6/2003: Dch v ADSL theo d n ca VNPT: D3,D4 (100)11. 7/2003: Cn bn k thut ADSL cho KASATI (40)12. 7/2003: C hi kinh doanh ADSL cho cn b qun
l Cng ty in bo in thoi ng Nai (200)13. 10/2003: Khai thc dch v ADSL cho Bu in
ng Nai (50)
PTTC2
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Cc lp ngn hn thc hin14. 3/2004: Khai thc dch v ADSL trn mng o
to t xa ISDN (540)
15. 3/2005: o th lp t ADSL trn mng o tot xa ISDN (300)
16. 1/2007: Ci t modem router ADSL cho Cng tyVin thng Cn Th Hu Giang (38)
17. 5/2007: Ci t modem router ADSL trn mngDTTX (220)
18. 6/2007: Ci t modem router ADSL cho bu inSc Trng (38)
19. 8/2007: Ci t modem router ADSL cho Cng tyVin thng Cn Th Hu Giang (30)
PTTC2
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Cc lp ngn hn thc hin
20 10/2007: Ci t modem router ADSL choVin thng Kin Giang (35)
21 5/2008: Ci t modem router ADSL choVin thng An Giang (65)
22 6/2008: Ci t modem router ADSL choVin thng Ty Ninh (40)
23 1/2009: Ci t modem router ADSL choFPT Telecom (350)
S hc vin hun luyn cho v ADSLtrong gn 10 nm: 2.916 hc vin
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PTTC2 - Bi dng kin thc c bn v vin thng
Gio vin:ng Quc Anh - www.dangquocanh.com 3
PTTC2
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Ni dung
Lch s pht trin vin thng1
Nhng thay i trong vin thng2
Mng cng cng mi3
S hi t4
PTTC2
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1 Lch spht trin vin thng
T xa xa: Thng tin m thanh: ci, trng, ng b 1790: Thng tin quang c xa semaphore 1838: in bo Morse 1876: Bell pht minh ra in thoi 1964: Fiber optical telecommunications 1970: ARPANET (Advanced Research Projects Agency
Network) 1979: 1G - Cellular networks 1981: Analog cellular mobile phones 1982: SMTP email 1983: Internet 1988: ISDN 1998: Satellite phones 1990: 2G Digital Networks 2001: 3G High speed IP data networks 2009: 4G WiMAX v LTE
PTTC2
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Dc chiu di lch svin thng
PTTC2
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Thng tin quang c xa (1/2)
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PTTC2 - Bi dng kin thc c bn v vin thng
Gio vin:ng Quc Anh - www.dangquocanh.com 4
PTTC2
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Thng tin quang c xa (2/2)
Thp thng tin quang Nalbach, c caClaude Chappe
Ph thuc vo:
iu kin thi tit
Tm nhn
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in bo Morse
1838 Samuel F B Morse gi dng chATTENTION, THE UNIVERSE! BYKINGDOMS, RIGHT WHEEL! qua ng dydi 16 Km
Da trn dot v dashDng nguyn l nn d liu: m ho k t
ngn hay di theo xc sut xut hin cachng
PTTC2
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in bo Morse
MARK(Z)
SPACE(A) SPACE(A)
DOT
MARK(Z)
DASH
3
: Unit element
LetterALetterBLetterA 42 2
6
PTTC2
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in bo Morse
- - Z- -M
- - -Y - L
- -X- -K
- -W - - -J
-V I
-U H
-T- - G
S - F
- RE
- - -Q- D
- - P- - C
- - -O- B
- N -A
InternationalCode
LetterInternational
CodeLetter
SOS = . . . - - - . . .
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PTTC2 - Bi dng kin thc c bn v vin thng
Gio vin:ng Quc Anh - www.dangquocanh.com 5
PTTC2
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My in bo ca Thomas Edison
PTTC2
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My in thoi
Elisha Gray v Alexander Graham Bell pht minh ramy in thoi (ng k bn quyn u tin)
PTTC2
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Tng i nhn cng
Dng bo hiu chung n
PTTC2
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Tn gi dy in thoi
Shell Sleeve
Insulators Tip [A]
Ring [B]
Insulator
Tip [A]
Ring [B]
Sleeve
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PTTC2 - Bi dng kin thc c bn v vin thng
Gio vin:ng Quc Anh - www.dangquocanh.com 6
PTTC2
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Tng i strowger
PTTC2
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Chuyn mch in thoi tng
PTTC2
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1842 Alexander Blain, ngiScotland ch to my fax utin
1850 Frederick Bakewell, ngiAnh ci tin h thng qut nhngy nay
1910 H thng truyn fax quc tu tin ti Ty u
1920 H thng truyn fax Bc M
K thut facsimile (1/3)
PTTC2
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1922 Dr. Korn truyn nh cGio Hong t La M sangNu c
1975 FCC cho php truyn fax v
modem trn PSTNThp k 80: Bng n vi s quan tm
ca ngi Nht Bn
Thp k 90: B Internet e-mail dm cht
n nay s dng rng ri fax ni ht
K thut facsimile (2/3)
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PTTC2 - Bi dng kin thc c bn v vin thng
Gio vin:ng Quc Anh - www.dangquocanh.com 7
PTTC2
www.dangquocanh.com25
Truyn dn: modem tng t
Nghi thc: HDLC
Nn nh:
Phng php nn mt chiu: MH(Modified Huffman)
Phng php nn hai chiu: MREAD
(Modified Relative Element AddressDesignate)
K thut facsimile (3/3)
PTTC2
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Nhc im ca fax
Hnh nh trng en, tnh, phn gii thp (200dpi)
Khng ph bin
Cc ph ng di
Tc truyn thp: 9.600 bps hay 14.400 bpsKhng c gi tr php l
Khng edit c
PTTC2
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Trang facsimile v e-mail
PTTC2
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Lch sISDN (1/2)
Nm 1977 CCITT nh ngha ISDN
ISDN Integrated Services Digital Network
ISDN Invented Services we Dont Need (?)
1985: AT&T th nghim thnh cng ISDN ln
u tin ti Hoa K Pht trin chm M do khng thng nht
trin khai gia AT&T v Nortel
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PTTC2 - Bi dng kin thc c bn v vin thng
Gio vin:ng Quc Anh - www.dangquocanh.com 8
PTTC2
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Lch sISDN (2/2)
Pht trin nhanh Chu u
Gn y b cc cng ngh truy xut tc cao xDSL v cable modem ln t
ISDN ph sn ngn 50 t US$ ca hn20 quc gia
ISDN Vit Nam: Game over (?)
PTTC2
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Nguyn l ISDN (1/2)
- Nguyn l:Thoi (tng t) + s liu (s) = ISDN
- Basic Rate Interface:
2B + D = 144Kbps
- Primary Rate Interface:+ Bc M: 23B + D / 24B (T1)
+ Chu u: 30B + D / 31B (E1)
PTTC2
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Nguyn l ISDN (2/2)
Knh B: truyn ti s liu knh 64 Kbps
Knh D: bo hiu, truyn ti s liu gi 16Kbps (BRI) hay 64 Kbps (PRI)
Knh H: knh truyn ti s liu tc cao:
+ H0: 6B
+ H10: 23B
+ H12: 30B + H11: 24B
PTTC2
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ISDN BRI
Truyn dn song cng ti giao din S/T:
Dng cp UTP (u ni RJ45)
2 i dy cho 2 chiu
2 i dy cp ngun
Truyn dn song cng ti giao din U: Phng php trit tn hiu di
Phng php ping pong
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PTTC2 - Bi dng kin thc c bn v vin thng
Gio vin:ng Quc Anh - www.dangquocanh.com 9
PTTC2
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Cu hnh ISDN BRI
NTTE1
TE1
TE1 TA
TE2
LT ET
VUS/T
R
CPE
LE
ET Exchange Terminal
LT Line TerminalNT Network Terminal
TE Terminal Equipment
TA Terminal AdapterLE Local Exchange
CPE Customer Premises Equipment
PTTC2
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2 Nhng thay i trong vin thng
Thay i cng ngh, nhu cu
Thay i mi trng kinh doanh
PTTC2
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Thay i v cng ngh, nhu cu
Dch v truyn ti d liu tc cao trn cpng do bng n Internet
S pht trin ca cc cng ngh gii tr gianh k thut s: hnh nh, m thanh, video,...
Cc kiu d liu ng dng mi: thc to,game 3D, bin tp video, to ni dung s,thng mi in t, gio dc trc tuyn v y
t t xa, ... S pht trin mng gia nh, SOHO S phn tn cc cng ty S pht trin ca di ng
PTTC2
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Thay i mi trng kinh doanh
S chuyn hng tc quyn sang cnhtranh kinh doanh vin thng
Xu hng cho thu h tng vin thng nhiu nc
Cc cng ty cnh tranh khng nui i ngbo dng chuyn nghip m hp ng vicc hng c lp
Chuyn mn v vin thng ngy cng phbin
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PTTC2 - Bi dng kin thc c bn v vin thng
Gio vin:ng Quc Anh - www.dangquocanh.com 10
PTTC2
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Mng cp ngy xa
PTTC2
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v... nay (1/2)
PTTC2
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v... Nay (2/2)
PTTC2
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Nhu cu a phng tin
Truy xut cc dch va phng tin
Lin lcVit blogHi hp
Di ng
Tin nghiThng thc
Mn hnh 2 inch, cng sut 2W,khong cch 6 tc
Mn hnh 42 inch, cng sut200W, khong cch 30m
Chi trU quyn
Lin lc c nhnQung co
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PTTC2 - Bi dng kin thc c bn v vin thng
Gio vin:ng Quc Anh - www.dangquocanh.com 11
PTTC2
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Nhu cu a phng tin
PTTC2
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Nh bp Internet Mobile - Multimedia
PTTC2
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3 Mng cng cng mi
Mng truy nhp:
ng: xDSL, Cable modem, PLC
Quang: FTTx
V tuyn: 2G, 2,5G, 3G
Mng li: MAN-E
Vai tr NGN khc xa vn ch l:
Tc cao Hp nht thoi, s liu
PTTC2
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4 Shi t
NGNNGNNGN
Hi t
FMCFMC PerformancePerformance+ QoS+ QoS
ProviderProvider PersonalizePersonalize
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PTTC2 - Bi dng kin thc c bn v vin thng
Gio vin:ng Quc Anh - www.dangquocanh.com 12
PTTC2
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Nn tng hi t theo NGN
K thut bo hiu: SIP
K thut ng gi d liu: IP
K thut chuyn mch v truyn dn: packet,ch lc l MPLS, MPS (GMPLS)
Hi t theo cc hng:
FMC
Performance + QoS Provider convergence: network and
application
Personalize
PTTC2
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IMS
PTTC2
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Decibel
Decibel
Lc u do Bell Telephone Laboratory a ral n v truyn dn transmission unit hay TU
1923 mang tn nh sng lp AlexanderGraham Bell
dBm
Ti sao dng decibel?
PTTC2
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Decibel
PIN POUT
li cng sut: (dB)
= 10lg(POUT/PIN)dB li in p:(dB) = 20lg(VOUT/VIN)dB
B khuch i: li dB > 0
B suy hao: li dB < 0
VIN VOUT
1/10 ln l -10dB
10 ln l 10dB
2 ln l 3dB
Bng nhaul 0dB
Mt na l -3dB
Thangdecibel
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PTTC2 - Bi dng kin thc c bn v vin thng
Gio vin:ng Quc Anh - www.dangquocanh.com 13
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Cu hi
Chn cch tnh mt bel.
A 10 log (VOUT/VIN)
B 200 log (POUT/PIN)
C 20 log (VOUT/VIN)
D 10 log (POUT/PIN)
E 100 log (POUT/PIN)
PTTC2
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dBm
dBm l mc cng sut 1mW trn ti 600 ohm
dBW l mc cng sut 1W trn ti 600 ohm
600 ohm1mW
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Ti sao dng decibel (1/2)
Php tnh logarith cho php chuyn phpnhn chia thnh php cng tr:
10dB - 2dB = 8dB
P1 P3P210dB -2dB
-2dB P3P1
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Ti sao dng decibel (2/2)
B khuch i vsuy hao ngcnhau c gi trli ngc du
nhau Chi tit ho phn
gi tr nh
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PTTC2 - Bi dng kin thc c bn v vin thng
Gio vin:ng Quc Anh - www.dangquocanh.com 14
PTTC2
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Nguyn l xuyn knh (1/2)
T trng cm ng ca cc dy dn
Dng in cm ng to ra trn cc dy dn ln cn Xon i gim c xuyn knh
PTTC2
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Xuyn knh u gn (NEXT)
NEXT = lg(POUT/PIN)dB Tng theo tn s vi t l lu tha 3/2 Ph thuc cng sut tc nhn NEXT theo chiu up ln hn down Xuyn knh u gn gia cc i dy cng cng
ngh tn hiu gi l SNEXT (Self NEXT)
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Xuyn knh u xa (FEXT)
Tng theo tn s vi t l bnh phng
ng dy ngn chu FEXT ln
Thng th FEXT nh hn NEXT
Xuyn knh u xa gia cc i dy cng cng nghtn hiu gi l SFEXT (Self FEXT)
PTTC2
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Gii thiu ISDN
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PTTC2 - Bi dng kin thc c bn v vin thng
Gio vin:ng Quc Anh - www.dangquocanh.com 15
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