A. 成本低
B. 透明性，傳輸業(yè)務(wù)種類多；(Transparent and various types of transmission service)
C. 簡(jiǎn)單，集成度高；(Simple and highly integrated)
D. 具有保護(hù)；(With the protection function)
E. 沒有保護(hù)；(Without the protection function)
F. 最高速率可達(dá)10G (The highest rate can reach 10G)