同义词
1)optical/digital loop carrier equipment(SDH-Based),同步数位阶层光数位回路载波2)optical/digital loop carrier equipment(SONET-Based),同步光纤网路光数位回路载3)Synchronous Digital Hierarchy(SDH ),同步数位阶层4)DLC Digital Loop Carrier,数位回路载波5)digital cross connect Ssstem equipment(SDH-Based),同步数位阶层数位交换连接6)Digital Cross Connect System Equipment(SDH-Based),同步数位阶层数位交换连接系统设备
