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工作学习 / IT杂谈 / High Speed 到底算什么东西？ ADSL？ ISDN？盒子上写的DSL
我记得国内的ADSL不是专用电缆么？ 这里怎么电话线连？
国内电话线连的不是ISDN么？ confused
-guest:cola;
2001-3-5
{104}
(#30505@0)
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Bell Sympatico uses ADSL (Asymetric DSL). Rogers@home uses Coxal Cable.Inidvidual consumer doesn't use ISDN.
ISDN is digitalized connection.
Don't confuse standards with physical
carriers. For example, ISDN is a digital
standard. Telephone line is the physical
carrier for ISDN.
-wjiang(wjiang);
2001-3-5
{217}
(#30511@0)
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ADSL or SDSL
-guest:;
2001-3-5
(#30512@0)
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DSL的流行就是因为使用了电话线，是用回波抵消的技术达到高带宽。而且使用的是你的电话线同时跑语音和数据，不需要专用电缆，isdn是一种过时的技术，只有中国电信还拿来骗骗人。
-chrisxu(chris);
2001-3-5
(#30558@0)
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how about cable modem?
-bolomi(bolomi);
2001-3-6
(#30639@0)
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取决于你的住址，如果你离局端设备(电信交换机房比较近，旧用adsl否则还是用cable，但别忘了你还要先接cable.
-chrisxu(chris);
2001-3-6
(#30641@0)
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你知道什么叫ISDN吗？什么叫过时的技术？不懂别瞎说。
-guest:;
2001-3-6
(#30645@0)
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懂的多说点
-bloor(bloor);
2001-3-6
(#30674@0)
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ISDN是过时了的.现在电信局都不愿使这玩意.只是钱抽\投下去,,不得不撑住,不信我????我就在电信局上班!(相关人员都在接受ASDL的培训了.)只可惜俺不是学程控的....
-bolomi(bolomi);
2001-3-6
{75}
(#30739@0)
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我确实不太懂，呵呵，反正学了也没用。当然你对isdn特别了解的话，转学atm其实挺容易的。两者的机制非常象。另外想一想你说的，也有道理窄带isdn虽过时了，但宽带isdn（atm）还没有呢，呵呵。
-chrisxu(chris);
2001-3-6
(#30835@0)
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my first job was working for Alcatel / Newbridge for LMDS, is wireless ATM, called LMDS.
-juliancanery(julian);
2001-3-6
(#30890@0)
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must know you instantly. I am doing Alcatel /Newbridge now!!!! e-mail me edwardjiang@hotmail.com
-wjiang(wjiang);
2001-3-7
(#30926@0)
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Does it like Ip over Fiber?Or you can tell me more?
-chrisxu(chris);
2001-3-7
(#30939@0)
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Are you talking about carrier?
spectrum 27-28 Ghz, bandwidth 1 Ghz, 10Mbps.Local Multiple Distribution Service-- BWA Broadband Wireless Acess.
for information please check IEEE802.16, or ITU recommadations on web site.
Please check Industial Canada web site for spectrum.
-juliancanery(julian);
2001-3-9
{203}
(#31617@0)