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本帖最后由 enson0129 于 2015-8-16 08:56 编辑
家里的cable合同还有几个月，一直速度都不错
最近modem router有点问题 就让telstra给发了一个最新的型号 结果总是无法激活，，打了好多电话 过了好几天 今天又打，说是应该可以了，原因是我以前的cable connection是DOCSIS 1 （cable 1）和最新的gateway不兼容，已经给我升级到DOCSIS 3 （cable 3）了。我一试，果然好了。
据说DOCSIS 3比DOCSIS 1 要快，但是给我的感觉不明显，以前我也差不多 89-90 mbps
但是新的gateway无线覆盖好 而且还支持最新的air 功能。。
特意给大家提醒一下
相关连接： https://en.wikipedia.org/wiki/DOCSIS
DOCSIS 2 vs. DOCSIS 3 differences ?
Tags: DOCSIS, cable modem, QAM, Frequency
The main difference between DOCSIS 2 and DOCSIS 3 standard cable modems is that DOCSIS 3 allows for a much higher maximum throughput. DOCSIS 3.0 achieves that by using multi-channel bonding (using multiple channels simultaneously for download/upload) while DOCSIS 2 modems do not. A Docsis 3 modem with 4 bonded channels, for example would provide 4 times the bandwidth of a Docsis 2 modem.
Some other technical differences:
Docsis 3.0 supports QAM128 for upstream traffic, while many DOCSIS 2 support only QAM64
Docsis 3.0 specs use 108Mhz to 1.002Ghz downstream, 5Mhz to 85Mhz upstream.
Docsis 2.0 specs use 88Mhz to 860Mhz downstream, 5Mhz to 42Mhz upstream.
Changing to a DOCSIS 3 capable modem isn't going to change your maximum speed up, down or
sideways, only subscribing to an upgraded tier will. However, DOCSIS 3 has the ability to use multiple downstream and upstream channels at the same time (channel bonding) to maintain the maximum possible speed. Because of this, DOCSIS 3 may experience less of a speed drop during peak usage hours vs. a DOCSIS 2 modem. The D3 modem, depending on how new it is and how many channels the ISP makes available, has access to 2x-8x more bandwidth than a D2 modem, allowing for a somewhat more consistent connection. |
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三国群英之我见 (2011-9-9) 大成若缺 
发表于 2015-8-16 08:46
