Registered Communications Distribution Designer (RCDD-001) — Question 5

A SONET OC-1 channel can carry 672 voice signals and has a data rate of 51.84 Mbps. A SONET OC-48 channel can carry 32,256 voice channels. What
MINIMUM data rate is required for the OC-48 channel?

Answer options

• A. 155 Mbps
• B. 622 Mbps
• C. 2.5 Gbps
• D. 5 Gbps
• E. 10 Gbps

Correct answer: C

Explanation

The SONET OC-48 channel's data rate is determined by multiplying the data rate of the OC-1 channel by the number of channels it can support. Since the OC-48 can carry 32,256 voice channels, the minimum data rate required is 2.5 Gbps. The other options do not meet the required bandwidth for the number of channels supported.