As the requirements for conducted emissions on "telecom" ports developed, definitions changed repeatedly -- all intended to describe the same cabling. At one point, "extensive networks" was used which I think better describes the situation. However, then the question is "What is extensive?" Also, the use of "telecom" is confusing, at least in North America. The emphasis here is on "tele and hence telecom networks are telephone networks. In CISPR however, telecom networks are communication networks that may involve voice.
There are many who will disagree with this, hence the problem in the first place. To me the situation is pretty clear and the standard does an adequate job of defining what it means, by example. You are expected to use common sense and judgment in determining the applicablity to your cabling system. Engineering judgment is still expected from those qapplying the standard. By the way, CISPR/F has nothing whatsoever to do with ITE. It is CISPR/I and formerly CISPR/G John P. Wagner Regulatory Compliance & Mandatory Standards AVAYA Regulatory Compliance Laboratory 1300 W. 120th Ave, Room B3-D16 Westminster, CO 80234-2726 Phone/Fax: (303) 538-4241 johnwag...@avaya.com From: John Woodgate [mailto:j...@jmwa.demon.co.uk] Sent: Friday, January 31, 2003 6:55 AM To: emc-p...@majordomo.ieee.org Subject: Re: EN55022:1998 and telecom ports I read in !emc-pstc that richwo...@tycoint.com wrote (in <846BF526A205F8 4BA2B6045BBF7E9A6A04675BB4@flbocexu05>) about 'EN55022:1998 and telecom ports' on Thu, 30 Jan 2003: >EN55022:1998 defines telecommunication ports as " Ports which are intended >to be connected to telecommunications networks (e.g. public switched >telecommunication networks, integrated services digital networks), local >area networks (e.g. Ethernet, token ring) and similar networks." > >Since "similar networks" are included, it would seem that dissimilar >networks are excluded. What distinguishes a similar network to a dissimilar >network? What are some examples of dissimilar networks that are not >included? Yes, well, CISPR/F (responsible for the underlying CISPR 22 standard) should have a *functioning* editing committee with enough experience and insight to weed out such phrases. List of examples are always troublesome in one way or another, and in any case MUST not be 'unterminated', by ending in 'etc.' or 'and similar', etc. (;-) -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
