1.線(xiàn)路時(shí)鐘提取線(xiàn)纜和時(shí)鐘分發(fā)線(xiàn)纜 2.控制面以太網(wǎng)線(xiàn)纜 3.用戶(hù)面光纖 4.監(jiān)控線(xiàn)纜
1.FR 2.HR 3.EFR 4.AMR