Assuming no cRTP or header compression. How many VoIP G.729 calls can be made simultaneously over a 128-kb/s Frame Relay circuit (Layer 3) if 50 percent of the circuit is dedicated to voice and 50 percent is dedicated to data?

A.
1

B.
2

C.
3

D.
4

E.
5

Explanation:

Bandwidth Calculation Formulas
These calculations are used:
Total packet size = (L2 header: MP or FRF.12 or Ethernet) + (IP/UDP/RTP header) + (voice payload size)
Codec bit rate = codec sample size / codec sample interval PPS = (codec bit rate) / (voice payload size)
Bandwidth = total packet size * PPS

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