用户: user; subscriber; consumer; ...环路: loop; ring circuit contour; ...信: letter; mail令: order; command; decree系统: system共路信令系统: ccss common channel signaling system; common channel signaling system no.ccsno用户局域信令系统: class custom local area signaling system环路信令: loosignalling用户环路: customer loop; subscriber loop直流环路信令: dc loosignaling (dirrect current)光纤用户环路: fiber in the loop数字用户环路: dsldigital subscriber loopop; xdsl digital subscriber loo x用户环路电阻: subscriber loop resistance; subscribers loop resistance用户环路费用: subscriber loop cost用户环路复用: subscriber loop multiplex用户环路载波: subscriber loop carrier号信令系统: ccitt signaling system no信令系统: ss signaling system信令系统7: ss7用户线路，用户环路: su criber line， su criber loop环路信令中继器: lsr loosignaling repeater高速数字用户环路: hdsl high speed digital subscriber loop数据用户环路载波: data subscriber loop carrier无线本地用户环路: wll wireless local loop用户环路传输方式: subscriber loop transmission system
