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200797


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    ??? 2005420????????[2000]27????
 
?1?ZDD?????
?2?ZDD????
?3?ZDD??
?4?ZDDIP?
?5?ZDD??
?6?ZDD??
?7?ZDD????VSAT??
?8?ZDD???

 

?1 ?ZDD?????
1.1???????
1.1.1????????????1????????
1.1.2???:??15???25?
???20???30?
?????????????????
1.1.3?:??12???24?
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1.1.4???:??12???24?
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1.1.5????:??12???24?
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1.1.6???:??24???48?
???36???72?
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?1??????????

1.1.7??????????45????15????????45????????????????????
1.1.8???90?
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1.1.9??????????15?
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??????????15????85
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1.1.10?????????????95
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1.1.11?????¨Z???????????????????????????
1.1.12?????????????5?
1.2??????
1.2.1??:??0.8???1?
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1.2.2??
?????????????1.9???5.3?????10?
?????????????2.2???7?????12?
????????????????2.3???7.2?????13?
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1.2.3?:??????????95
???????????90
?????????????85
????80
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=-(???+??+??+?)
1.2.4:????21dB
??????
1.2.5?:??0.1???1
1.2.6?:????1
1.2.7?:????????0.1
???????1
1.2.8?:??13?
??????85?
??DCME????150?
1.2.9?:??2104
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1.2.10?????
???????20???45?
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1.2.11????:?????95
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1.2.12??:????72?
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1.2.13??:????10???24?????99
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1.2.14??:?? 104
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?2 ?ZDD????
2.1??????
2.1.1????w?Ǧ
2.1.2????????????1????????
2.1.3??:??1???24?
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2.1.4???:??1???24?
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2.1.5?????:??24???48?
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2.1.6?????????45????15????????45????????????????????
2.1.7????90?
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2.1.8??????????15?
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2.1.9???????????????????????????5?
2.2??????
2.2.1?:w?90?99??20???
2.2.2?:????????90
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2.2.3??
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2.2.4???:?5
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2.2.5????:???3
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2.2.6?????:??????99
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2.2.7????
??????3???24???????95
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2.2.8????:?????105
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2.2.9???
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2.2.10??:???104
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?3?ZDD??
3.1????
3.1.1????
3.1.1.1??????C??
??12???24?
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3.1.1.2????????
??12???24?
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3.1.1.3????????????????
3.1.1.4?????????
3.1.1.5????:??8???12?
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3.1.2????
3.1.2.1???:??90
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3.1.2.2????:???8???11?
??????????????????
3.1.2.3 ??:???99
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????????ڧ?99%???????
3.2????
3.2.1????
3.2.1.1??????????w????
3.2.1.2??:??3???5?
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3.2.1.3??:??2???4?
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3.2.1.4????:??8???12?
??????????????????
3.2.2????
??????????IP??????????????()??????????1000?
3.2.2.1IP?:???200?
IP????IP???(A)???(B)????(A)???
3.2.2.2IP??:????80?
IP??????IP?IP????
3.2.2.3IP?:???2%
IP??IP?????
3.2.2.4IP?:IP??99.9
IP?????IP??IP?????5??IP????75????????
3.3X.25DDN?????
3.3.1X.25DDN?????
3.3.1.1??:??4???8?
??????????????????
3.3.1.2??
???3???5?
????4???7?
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3.3.1.3????:??4???8?
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3.3.2X.25DDN?????
3.3.2.1X.25????
3.3.2.1.1???1
????????????????1?????1X?2
3.3.2.1.2????3
??????????,???????3 ??????3Y?4
1?????
?? () ???() ()
A B A B A B
?? 2000+2X 2600+2X 1000+X 1600+X 250 1600
95? 2700+2X 3100+2X 1500+X 2100+X 250 1800
?1.95?95?????2.A???3.B?????????4.A??????5.B??????????6.X=400/RR????kbit/s7.?D?ITU-T X.25?Ǧ????٦ʦ??D?????????D???p25
2?????X?
R(kbit/s) X()
2.4 167
4.8 84
9.6 42
48.0 9
64.0 6
3??????
?? () ???() ()
A B A B A B
?? 700+2Y 1000+2Y 350+Y 650+Y 215 950
95%?? 950+2Y 1250+2Y 525+Y 825+Y 215 1125
?1.?????????,????2.95?95?????3.AB4.2?4.?D????128???136D????DTE?????
4??????Y?
R(kbit/s) Y()
2.4 453
4.8 227
9.6 113
48.0 23
64.0 20
?:R????kbit/s
3.3.2.1.3??5
??????????(????)???5???
5???
?? ?bit/s ?bit/s
A B A B
?? 3500 2400 2000 2000
95? 2400 2000 1800 1800
?1.??????2.95?95???3.AB4.2?4.?D??9600bit/s?D???128??D???2???7D?D?D=0D?ʦ???D???????D???2002?
3.3.2.1.4????95
????????
3.3.2.1.5??99.99
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3.3.2.2DDN????
3.3.2.2.1???
1?
?????UNIDDN?????????
?M.2100PDH????????M.2101SDH????????
2?
?????UNI????
?YD/T748-95PDH????YDN 026-1997SDH?DSDH?????????
3.3.2.2.2????
164kbit/s?????40?
22Mbit/s??????0.5N+0.005G?N??G??km
31?2??????300?
?DDN?????????
3.3.2.2.3??99.99
????????????
3.3.2.3?????
3.3.2.3.1??(FTD)??(FTD)< 400?
???????????
?????FTD= t2-t1
?t1?????1??????
t2?????????
3.3.2.3.2??(FLR)??(FLR)< 3X10-5
???????????
?????FLR=
?FL ?????FS ????
FE ??
???????(CIR)??????(FLRE)???(FLRC)?
3.3.2.3.3???99.99
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?4?ZDDIP?
4.1IP???
4.1.1??????IP??IP????????????????????????
4.1.2??IP??
??24???48?
??IP?????????IP????
4.1.3??IP?
??24???48?
??IP????IP?????IP?????
4.1.4??IP?????????????
4.1.5??IP???????????
4.1.6IP?????
??12???24?
IP??????????????????IP?????????IP????
4.1.7???????IP??IP???ݍ?IP????5?
4.2IP???
4.2.1??
???????7???11?
???????11???21?
???????11???15?
???????15???24?
????????????????
???????IP????????????
4.2.2?????400?
???????????
4.2.3??????80?
???????IPIP??????IP?IP????
4.2.4???5
?????RTPIP????RTP(??RTP)?RTP??
4.2.5??????72
????????????y??????
4.2.6????5
?????????


?5?ZDD??
5.1????
5.1.1?????????????????
5.1.2???????12???24?
???????????????????
5.1.3??????15?
??????????????
5.1.4????????
5.1.5????????????e????????10??e??????????10??
5.1.6????????????????
5.1.7?????90?
??????????
5.1.8??????????????????
??????15???151?
5.2????
5.2.1????
????????????6?
?????????????10?
??????????????????????????????
5.2.2????????95????
????????????????????
5.2.3??
????60???400?
???90?
???7?
???7?
ʧ??10?
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5.2.4??????95
?????????????

?6?ZDD??
6.1?????????????????????????
6.2?????ʧ?????????????????????????
????????????????????????
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6.3?????????????????????????????????????????????
6.4?????????????????????????
6.5???????????????????????95?
6.6?????????????????????000000000???????
??????????????
6.7??????????????????????????5???????????????
6.8????????????????????????????????
6.9???????????????????????
6.10????????


?7?ZDD????VSAT??
7.1????VSAT????
7.1.1?????20???30?
???25???40?
???????????????????????????????????
7.1.2??????3???7?
???7???15?
????????????????????????????????????
7.1.3??
??VSAT????????VSAT??????
7.2????(VSAT)????
7.2.1???
???99.5C???Ku???
???????????????VSAT??????
7.2.2????????92
????VSAT??????VSAT???VSAT???????????1???????????
7.2.3????
VSAT????????8???14?
VSAT????????16???25?
??VSAT??????11???18?
VSAT??????????4???8?
7.2.4??????2104
?????????
?????VSAT???????
7.2.5????????107
?????VSAT????VSAT?????????
7.2.6??????104
?????????


?8?ZDD???
8.1?????
8.1.1??
8.1.1.1????
??3???5?
8.1.1.2???
??4???8?
8.1.1.3PDH??VC-n????????????????????
???????????????
8.1.2??
8.1.2.1???????20???30?
8.1.2.2?????33.3.1.2?
8.1.2.3PDH??VC-n?????????????????????
?????????????????
8.1.3???
8.1.3.1????????24???48?
8.1.3.2??????33.3.1.3?
8.1.3.3PDH??VC-n??????????????????????
?????????????????
8.1.4??????24???48?
??????????????????
8.2?????
8.2.1???
????????????????????????????????GB 11053???GB 11054???
8.2.2????33.3.2.2֧??
8.2.3PDH??VC-n????
PDH???283445140Mbit/s???
VC-n???VC-12VC-3VC-4VC-4-Xc????
PDH??VC-n?????????????????
8.2.3.1
PDH????YD/T 748PDH?????
VC-n????YDN 026SDH?--SDH?????????
8.2.3.2?
?PDH??VC-n?????(0.5N+0.005G)?N??G?
8.2.3.3
??????????????????????????????
8.2.4???o???
???o????????o????
?????????????YDN 099????
?????????
8.2.5??????
?????????????????????????????????YD/T 1012?????????