John Combs wrote: > I'm not quite sure what side of the T1 (E1) line you're talking about, but > from your comments I assume that you're referring to what is called DSX1 in > North American terminology. Please note that on the DS1 (other side) that > there are span-line repeater voltages to deal with, nominally 130VDC, but > there are "long-reach" repeaters out there that apparently operate at > 260VDC! I know that they use span-line repeater voltages on E1 lines in > Europe as well, because a customer of ours was recently complaining about > how difficult it was to take care of the compliance requirements since the > voltage exceeded the LVD.
Hi John, Short answer to your question is - Nope. You are on the "hot" or "wet" side of an office repeater that feeds to the outside where your repeaters reside. I am not referring to any outside equipment or outside environment. I am referring to a central office environment. Also, a little terminology correction - DSX1 and DS1 references do not formally apply here. DSX1 or DS1 are SIGNAL formats. They only indicate that a signal of 1.554 Mbps in a particular format is being sent over a circuit. DSX1 and DS1 have nothing to do with the actual physical circuit or power. The correct CIRCUIT format reference to the physical circuit is T1/T3 for the US, or E1/E3 for Europe. In my senerio, if you are WITHIN a central office (not in the local loop to a subscriber and not on the hot side of your office repeater) using T1 WITHIN the CO, you're equipment is handling signals down aroung TTL levels and could be powered by 48vdc and thus not covered by the LVD. ************************************************************ ------------------------------------------------------------ The comments and opinions stated herein are mine alone, and do not reflect those of my employer. ------------------------------------------------------------ ************************************************************
