In SONET, STS-1 level of electrical signalling has the data rate of _________

A. 51.84 mbps

B. 155.52 mbps
C. 2488.320 mbps
D. 622.080 mbps

Explanation: STS-1 level provides the data rate of 51.84 Mbps, STS-3 provides a data rate of 155.52 Mbps, STS-12 provides a data rate of 622.080 Mbps and STS-48 provides a data rate of 2488.320 Mbps.

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