A.1879MB.938MC.914MD.1810M
A.1.024Mbit/sB.2.048Mbit/sC.3.072Mbit/sD.4.096Mbit/s
A.數(shù)字交換網(wǎng)絡(luò)B.中央處理機C.中繼模塊D.信號設(shè)備SDH網(wǎng)絡(luò)單