|
<cite style="line-height: 1.3em; margin-top: auto; margin-right: 10px; margin-bottom: auto; margin-left: 10px; color: rgb(153, 153, 153); font-size: 12px; "><a href="http://www.freeoz.org/ibbs/space.php?uid=4402" target="_blank" style="color: rgb(0, 0, 0); text-decoration: none; ">cnlancer</a></cite><span style="color: rgb(153, 153, 153); font-size: 12px; line-height: 19px; "> 威望 </span><strong style="color: rgb(153, 153, 153); font-size: 12px; ">+20</strong><span style="color: rgb(153, 153, 153); font-size: 12px; line-height: 19px; "> </span><em style="font-style: normal; line-height: 1.3em; color: rgb(102, 102, 102); margin-top: auto; margin-right: 10px; margin-bottom: auto; margin-left: 10px; font-size: 12px; ">cabel速度不会随距离的增加而降低吗?</em><span style="color: rgb(153, 153, 153); font-size: 12px; line-height: 19px; "> 7-3-2012 10:34</span> <div><br></div><div>bigpond的这个最新的cable,是使用的
<a href="http://www.ti.com.cn/general/cn/docs/gencontent.tsp?contentId=52937">DOCSIS 3.0</a>技术,100Mbps只是起步, 如果需要,可以轻松达到300~600 Mbps以上的速率,所以,现在应该是不用太担心的, 我家距局端就比较远,速度基本没影响。</div><div><br></div><div>而且这个cable和adsl有一个不同就是,cable只解决最后一公里的问题, telstra在主干网络上会使用以太网或者光缆来传输, 所以信号不是到局端再解调的, 也没有上下行速度不对称的问题,现在的上行速度限制,是人为的。</div><div><br></div><div><br></div><div><span style="text-align: -webkit-auto; background-color: rgb(255, 255, 255); "></span><span style="font-family: sans-serif; font-size: 13px; line-height: 19px; text-align: -webkit-auto; background-color: rgb(255, 255, 255); ">In the UK, broadband provider </span><a href="http://en.wikipedia.org/wiki/Virgin_Media" title="Virgin Media" style="text-decoration: none; color: rgb(11, 0, 128); background-image: none; background-attachment: initial; background-origin: initial; background-clip: initial; background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 13px; line-height: 19px; text-align: -webkit-auto; ">Virgin Media</a><span style="font-family: sans-serif; font-size: 13px; line-height: 19px; text-align: -webkit-auto; background-color: rgb(255, 255, 255); "> announced on 20 April 2011 an intention to start trials with download speeds of 1.5 Gbit/s and upload of 150 Mbit/s based on DOCSIS3.0.</span><sup id="cite_ref-2" class="reference" style="line-height: 1em; font-family: sans-serif; text-align: -webkit-auto; background-color: rgb(255, 255, 255); "><a href="http://en.wikipedia.org/wiki/DOCSIS#cite_note-2" style="text-decoration: none; color: rgb(11, 0, 128); background-image: none; background-attachment: initial; background-origin: initial; background-clip: initial; background-color: initial; white-space: nowrap; background-position: initial initial; background-repeat: initial initial; ">[3]</a></sup> <a href="http://en.wikipedia.org/wiki/DOCSIS#cite_note-2" style="text-align: -webkit-auto; background-image: none; background-attachment: initial; background-origin: initial; background-clip: initial; background-color: initial; "></a></div> |
|