光同步数字传输网
optical synchronous digital transmission network
synchronous digital hierarchy SDH
chemical pharmacon for reduced resistance
IP over SDH
SDH
同步数字通信传输网
a digit synchronized communication net
电力数字同步网
power digital synchronization network
管理网-同步数字序列管理网
SMILSDH management network SDH
数字同步网
digital synchronization network
digital synchronous network
Synchronous digital networks
digital symhronization network
synchronouse network
SDN
数字同步网络
digital synchronization network
SDH
同步数字传送网
synchronization digital transport network
synchronous digital hierarchy transport network
数字-数字数据变换器
digital-to-digital data converter
综合业务数字网数字用户线
ICANNISDN digital subscriber line
IDNISDN digital subscriber line
b bandwidth
多路同步数字信号
multi-channel synchronous digital signal