GR-1089 does allow a get-out for intra-building surges for STP if grounded at both ends of the STP cable. Some customers still insist that intra-building Surges are applied to the conductors regardless of the cable type, STP or UTP. [We 'design in' Intra-building surge protection (as a mimimum) for all our interfaces, ENET, T1, RS232 etc]
____________________________________ Andy White, Staff EMC Engineer Ericsson Wireless Communications Inc. San Diego, CA 92121 Tel 858 332 6214 / 877 877 7799 ext 26214 Fax 858 332 7311 e-mail [email protected] ____________________________________ From: Cortland Richmond [mailto:[email protected]] Sent: Friday, January 31, 2003 10:21 AM To: ieee pstc list Subject: RE: EN55022:1998 and telecom ports David Sterner wrote: >> UTP has been repeatedly shown to radiate less than STP. << Telcordia GR-1089 exempts STP from intrabuilding surges; the shield is assumed to carry them. This makes it attractive for US telecom designers whose equipment uses Ethernet. Cortland 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] 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
