Answer the following questions about the digital hierarchy inFigure 6.23:

a. What is the overhead (number of extra bits) in the DS-1 service?
b. What is the overhead (number of extra bits) in the DS-2 service?
c. What is the overhead (number of extra bits) in the DS-3 service?
d. What is the overhead (number of extra bits) in the DS-4 service?

Transcribed Image Text:

6.312 Mbps DS-0 4 DS-1 44.376 Mbps 7 DS-2 т DS-1 24 D т DS-2 274.176 Mbps D 6 DS-3 M т DS-3 D м 64 kbps т DS-4 D 1.544 Mbps 24 DS-0 м