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ADSL ӧҹҧ? ͧͧ

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ҾСͺҡԹ
How ADSL work?

ҡѾ֧ҹҹ
÷ӧҹͧ ADSL ԴҧѾ (Central Office) ¼ԡ еͧԴͧػóѭҳ¡ DSLAM (DSL Access Multiplexer) 㹷ء ·ԡ 觨з˹ҷѭҳҡҹ 㹪Ѿ ҡ鹢Ũж١觼ҹ ͢´ԨԵŤ٧ ѧٹҧͧԡ (ҾСͺ) Шҡ鹼ԡ ADSL ѧԡâ (Service Provider) ISPs ͢¢ͧͧ

ADSL ӧҹҧ? ͧͧ

Pots Splitter
ػóӤѭաҧ˹觷 ADSL ö觢 ѺҹѾ Pots Splitter ѹ˹ҷ㹡áͧѭҳդ٧͡ҡ ѭҳҹҹ ¶١Դ駷ҹ зѾ (ҾҹСͺ) 蹤ҡաҹѾ ѭҳѾж١觼ҹ·ͧᴧ ѧѾ (Central Office) ѭҳѾ ж١觼ҹѧ͢ѾҸó (PSTN: Public switch telephone netowok) ѧŢ»·ҧ ǹѭҳ (DATA) ж١觼ҹѧػó DSLAM

෤Ԥѭҳ (Modulation Technique)
÷ ADSL ö觢žѺҹѾ ͧҡ ADSL ෤Ԥѭҳ (Modulation) ҹ٧ҡҹѾ · 觻ԡҹѾҹ 0 - 4 KHertz Сҹ 56K Analog ӡѭҳ ҹ蹡ѹ ҹǡѺҹѷ ҹöѾ 㹢з ADSL ѭҳҹ٧ 4 KHertz ͵ 30 KHertz 仨֧ 1.1 MHertz ADSL ෤Ԥѭҳ 2 Ը CAP DMT (ҾСͺ) 觴෤Ԥͧ Ѻ-觢Ŵ ADSL ֧öѾ繻 úǹѹҧ ػó Pots Splitter 㹡¡ҹͧ 㹡Ѿ͡ҡѹ

ADSL ӧҹҧ? ͧͧ ADSL ӧҹҧ? ͧͧ

CAP ෤Ԥ١ѲҢ㹪ǧá 觨ҹ͡ 3 ǧҧ Uplink(觢) Downlink(Ѻ) Pots(ҹѾ) 㹢з DMT աЪǧ ͡繪ǧ ա¡ Bin кԹж١͡ Bin 4 KHertz ෤ԤդسѵԾɤ ѹö͡ҹ ѺҾǴФسҾ㹢йѵѵ 觻Ѩغѹ ෤չ ෤ҵðҹ㹡ѭҳͧ ADSL

 


http://www.adslthailand.com