Greetings all, I have a general question about E3/DS-3 in the EU. I have heard that it is no longer necessary to isolate one of the two Tx/Rx coax ports but can't find a definite answer. I'd like to know if I can directly tie both the TX and RX ports to chassis for intrabuilding only CO lines. This would make EMI/EMC much easier to pass and would get rid of the special AC coupling that would otherwise be necessary.
The only reason that I could ever understand for the DC isolation requirements that used to be in place was to prevent ground connections in IBN CO's or to eliminate current on the shields due to differences in earth potential between buildings. As neither of these really apply, I really don't see why it should still be necessary to provide the DC isolation (I have only intrabuilding lines and most CO's are now CBN installations). Does anyone know what the current status on this is? Thanks, Patrick ------------------------------------------- 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] All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
