Broadband optical access network (OAN) is one of the important methods to realize BISDN.

宽带光接入网(OAN)是实现B -ISDN的重要基础之一。

youdao

Broadband optical access network (OAN) is one of the important methods to realize BISDN.

宽带光接入网(OAN)是实现B -ISDN的重要基础之一。

youdao