To send a T1 signal we need
Hlog2, (1 + S / N ) = 1.544 x 106 with 50,000.
S / N = 230 -1,48 ~ 93 db.
Data Communication and Computer Networks MCQ - Data Communication
In the case of go-back-n protocol, when a NAK is received, all the frames sent since the last frame acknowledged are retransmitted. Go ----> Back ----> n.
53
PURE ALOHA
In bipolar code, the signal varies among three levels. In non-return to zero code, the signal remains the same through-out the bit cell. In unipolar code, there will be no signal either below zero or above zero. In Manchester code, the signal level will not vary in the middle and is unipolar.
