选自：www.physorg.com, 不错的网站，强烈推荐。
要点：
- 西门子推出的用于家庭内部联网的电力线适配器(同我们现在用的基于Wifi的无线路有器功能一样)
- 不懂技术的傻瓜都可以使用，不需要复杂的安装配置 - 希望WiFi也能够做到这一点，我相信人类的聪明才智是能解决任何问题的。
- 传输速率达到200Mbps，可以同时支持2路高清节目之余用于高速上网，这看起来是个比较大的卖点，毕竟电视不需要经常移动，相比WiFi有优势。
- 今年10月份开始供货
- 功耗低，只有3W。这个优点并不在于有多省电，更重要的是电磁辐射少，能够满足CE Class B的测试规范要求。基本上对其他设备不产生任何干扰。目前市面上90%的电力线通信装置只能符合Class A。不要小看这个，如果你把某些国产的ADSL Modem靠近一些国产的路由器或其他电器，会发现DSL的传输速率降下来很多，尤其是你的电话线无意之中搭在了这些电器装置或其电源上。低功耗、低辐射、低干扰对于实际的性能是非常重要的。低功耗的另外一个好处就是可靠性高，功耗高的电路板发热严重，导致模拟器件性能偏离，长时间下去老化加剧，寿命降低。
电力线局域网的优点：
- 不需要外接电源适配器
- 只要有电源插座的地方就可以使用，空间位置灵活
缺点：
- 相对于无线局域网移动性能差。
- 笔记本电脑都把Wifi作为缺省配置，抢夺这块市场已经不太现实。
Siemens is now offering a Powerline adapter for fasttransmission of DSL data around the home. The Gigaset HomePlug AV 200makes setting up a home network a simple task, even for adults withoutany technical knowledge. Remote PCs can be networked with the DSL routeror various units between one another via the existing mains powernetwork and without additional cabling. The data transmission speed is200 megabits per second , which is sufficient for two HDTV signals plusadditional downloads from the Internet. The unit will be available fromOctober.
 
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Installation involves the userconnecting an adapter to the DSL router via a network cable andplugging the adapter into a power socket. The DSL data is nowaccessible at any other mains socket by plugging in a second adaptor.PCs, laptops, printers or set-top boxes can also be connected to oneanother in this way.
The user doesn’t need to do anything else after plugging the unitsin — all settings such as synchronization and encoding take placeautomatically. Other solutions sometimes require the user to configurethem on the PC using special software and enter keys. Adding furtheradapters to the home network simply requires pushing a button forregistration or disconnection. One unique feature is the opticalbandwidth display. LEDs not only provide information on the powersupply and LAN connection, they also use colored signals to indicatethe quality of the connection. What’s more, speech and video signalsreceive priority over other data traffic, ensuring high quality forthese applications, which are dependent on real-time transmission.
Another advantage of the adapter from Siemens Home and OfficeCommunications is its low power consumption of just three watts. It iscertified according to CE Class B, which guarantees low electromagneticemissions; as a result, there is virtually no interference with otherunits. At present, around 90 percent of the Powerline units availableon the market are rated as belonging to the inferior Class A. |
发表于 2007-10-2 14:28:28
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