The scenario that caused the addition of the “assuming it is used as intended” phrase was RS-232. RS-232 normally is limited to 15 meters of cable, and that was not considered to be telecom length. But, the Australian committee claimed that there were installations with 1000 feet of cable. Not running at full speed, obviously. Thus the qualifying phrase.
Ghery From: [email protected] [mailto:[email protected]] On Behalf Of Mike Hurley Sent: Wednesday, September 09, 2009 9:03 AM To: Gartman, Richard Cc: [email protected] Subject: Re: EMC question Hi Richard, the 2006 edition of 55022 defines telecoms ports in section 3.6. The note to this section makes it clear that USB ports are not to be considered telecom ports. The above however does assume that the USB port is being used for its normal role of interconnecting components of an IT system. I'm sure someone will come up with a scenario whereby it could be considered to be a telecoms port! Mike Gartman, Richard wrote: In EN55022 there is a reference to a Telecommunication port. Is a USB connection considered a Telecommunication port? The USB has a power and two data lines. Does this make it a telecommunication port? Thank you for you assistance W. Richard Gartman, MS, CSP Product Stewardship Manager Texas Instruments, Education Technology 7800 Banner Drive, Dallas, Tx 75251 Office: 972-917-1636 Email: [email protected] <mailto:[email protected]> Fax: 972-917-0668 URL: www.education.ti.com <http://www.education.ti.com/> www.education.ti.com/us/productstewardship <http://education.ti.com/us/productstewardship> - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]> ________________________________ No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.409 / Virus Database: 270.13.87/2356 - Release Date: 09/09/09 06:53:00 - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]> - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]>
