Fonte: <a href="http://www.itu.int/net/pressoffice/press_releases/2011/18.aspx">http://www.itu.int/net/pressoffice/press_releases/2011/18.aspx</a><div><a href="http://www.itu.int/net/pressoffice/press_releases/2011/18.aspx"></a><br>
-- Sérgio/CT1HMN</div><div><br></div><div><br><div class="gmail_quote">2011/6/13 João Costa > CT1FBF <span dir="ltr"><<a href="mailto:ct1fbf@gmail.com">ct1fbf@gmail.com</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
PLT - Forum highlights radio interference fears<br>
<br>
At an ITU forum discussing the problem of polluting PLT devices, Dr<br>
Hamadoun Touré, Secretary-General, ITU, cautioned service providers<br>
and others against rolling out technologies conforming to<br>
specifications that do not meet ITU requirements.<br>
<br>
The ITU press release says:<br>
<br>
Concerns that home networking products using power line transmission<br>
(PLT) technology may cause interference with radio services led to a<br>
Forum last week in Geneva to address the issue. ITU’s own home<br>
networking standard ITU-T G.hn was considered to have electromagnetic<br>
compatibility (EMC) and mitigation techniques that go well beyond<br>
those considered essential for protecting radio services.<br>
<br>
Given the variety of electronic devices in our homes, strict EMC<br>
requirements are imperative. Over-the-air broadcast services in<br>
particular could be subject to interference from PLT systems.<br>
<br>
The event took place in parallel with an interoperability event giving<br>
ITU-T G.hn chipset vendors the opportunity to test their products,<br>
which will be on the market later this year. It brought together radio<br>
spectrum experts from national regulators, service providers, and<br>
product manufacturers, as well as standards development organizations<br>
(SDOs) and industry alliances including ETSI, IEC, IEEE, HomeGrid<br>
Forum, IARU, NAJO/IAU and HomePlug.<br>
<br>
The Forum successfully achieved its goal of agreeing on commitments<br>
and future actions by all stakeholders to resolve interference issues<br>
in the interest of consumers. A key conclusion is that ITU will act as<br>
the focal point for coordinating other SDOs and industry alliances in<br>
order to agree further developments.<br>
<br>
“There are PLT products on the market that do not conform to the<br>
necessary EMC standards, and this is very much a concern,” says Dr<br>
Hamadoun Touré, Secretary-General, ITU. “We are fortunate in ITU to<br>
have telecom and radio experts from both the private sector,<br>
government and regulators. Together they have agreed the necessary<br>
requirements to ensure that products conforming to ITU standards do<br>
not cause interference, which may have potentially serious<br>
consequences. We would caution service providers and others against<br>
rolling out technologies conforming to specifications that do not meet<br>
ITU requirements.”<br>
<br>
John Shaw, representing BBC World Service, said at the meeting: "For<br>
broadcasters, it is extremely important that products sold do not<br>
interfere with the reception of programmes or reduce coverage. We<br>
applaud the efforts of ITU to ensure international acceptance of the<br>
organization's stringent guidelines on compatibility between<br>
electronic communication systems and the use of the radio frequency<br>
spectrum." Similar views were also expressed by representatives of the<br>
aeronautical and radio astronomy communities.<br>
<br>
Ban Powerline Technology<br>
<a href="http://www.ban-plt.co.uk/" target="_blank">http://www.ban-plt.co.uk/</a><br>
<br>
Parliament PLT debate<br>
<a href="http://www.southgatearc.org/news/may2011/plt_debate_text.htm" target="_blank">http://www.southgatearc.org/news/may2011/plt_debate_text.htm</a><br>
<br>
UKQRM are a group fighting this interference<br>
<a href="http://groups.yahoo.com/group/UKQRM/" target="_blank">http://groups.yahoo.com/group/UKQRM/</a><br><br></blockquote></div>
</div>