NOTE 1: Outdoor lines carrying DC power with superimposed signals shall be treated as outdoor signal lines.
NOTE 2: For switching equipment which is intended to be installed in locations other than telecommunication centres, the requirements for immunity to surges on outdoor signal
lines and to continuous conducted disturbances on signal lines are according to the requirements for telecommunication centres. This reduction is based - amongst other
things - upon the screening effect of multi-pair cables and specific earthing/bonding techniques in use for switching equipment.作者: 孔今 时间: 2011-8-17 20:39
NOTE1：应该是说既传信号又传电源的线要被视为信号线。
