What is the basic unit of framing in SONET and the bit rate for its transmission?

seenagape

9 years ago

A.
STS-1 with a bit rate of 5184 Mbit/s

B.
STS-1 with a bit rate of 15552 Mbit/s

C.
STS-1 with a bit rate of 2048 Mbit/s

D.
STS-1 with a bit rate of 1544 Mbit/s