How many signaling bits are there in each T1 time slot using channel associated signaling with
Super Frame?

A.
1

B.
2

C.
4

D.
8

E.
12

Explanation:
Each T1 CAS has 24 channels that can transmit 8 bits per channel each. This gives us
a total of 192 bits. The T1 has one additional bit for framing, bringing the total to 193 bits. Two

types of line coding can be used on a T1 CAS. The first type of line coding is called Super Frame
(SF). This is an older and less – efficient type of framing. Super Frame bundles 12 of these 193 –
bit frames together for transport. It then uses the even – numbered frames as signaling bits. The
T1 CAS signaling then looks at every sixth frame for signaling information. This comes out to be 2
bits that are referred to as the A and B bits, which reside in frames 6 and 12.