An engineer is planning the voice call bandwidth requirements between two offices. The design requires a capacity of 25 concurrent audio calls using the G.729 codec and IPv6 transport. Which two configurations meet the requirements? (Choose two)
A. required bandwidth 850 kbps, given Ethernet transport, and a 30-byte payload.
B. required bandwidth 975 kbps, given Ethernet transport, and a 20-byte payload.
C. required bandwidth 400 kbps, given Ethernet transport, compressed RTP, and a 30-byte payload.
D. required bandwidth 300 kbps, given PPP transport, compressed RTP, and a 20-byte payload.
E. required bandwidth 250 kbps, given PPP transport, compressed RTP, and a 30-byte payload.
F. required bandwidth 650 kbps, given PPP transport, and a 20-byte payload.
