mstp osn7500 ssn1dcu series osn3500 ssn1dcu(60km/60km lc)

华为传输mstp多业务传送平台osn2500

mstp huawei osn 1500 sdh transmission network osn1500a osn1500b

简易型sdh光端机系列-sdh/mstp光端机-光端机专业厂家-广州邮通公司

mstp osn3500 ssn3egs211 2xge switching and processing board osn