What is not a function of the F-bit on DS1 using Extended Super Frame (ESF)?
A.
It is used for signaling on-hook and off-hook status
B.
It is used for a frame’s synchronization and alignment
C.
It is used for control and performance information
D.
It carries CRC information for error detection
Explanation:
ESF extends the DS1 framing from 12 to 24 frames so that an 8-kbps F-Bit pattern can be used for three separate functions: Framing, CRC and data link.