<p>倒换时间小于50ms这个指标是有前提的,就是有效传输距离小于1200KM的情况.但是大于的情况我就不是很清楚了,MSP遵照ITU-T的G.841标准,我又去找了一下也没发现有具体的说明,不知道那位高人有办法。这是G.841的原文,有兴趣的看看呵呵</p><p class="enumlev1" style="MARGIN: 4pt 0cm 0pt 39.7pt;"><font size="3"><font face="Times New Roman"><i style="mso-bidi-font-style: normal;"><span lang="EN-GB">Switch time</span></i><span lang="EN-GB"> – The APS algorithm for LO/HO VC trail protection shall operate as fast as possible. A value of 50 ms has been proposed as a target time. Concerns have been expressed over this proposed target time when many VCs are involved. This is for further study. Protection switch completion time excludes the detection time necessary to initiate the protection switch, and the hold-off time.</span></font></font></p>
时间: 2007-8-9 08:40
作者: richardxhy
<p>确实没有注意到这个问题,请高手回答。</p>
时间: 2007-8-10 21:32
作者: liangzhuo419
其中ITU T G.841中提到,小于1200公里的环网,可以按照50ms进行测试,对于大于1200公里的环网,测试值可以大于50ms的,这是我经过查询国标后的结果,与大家分享。<br/>