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350-030 · Question #168

On a WAN PPP link, what is the required bandwidth for three G.729 VoIP calls when cRTP is turned off, and what is it when cRTP is turned on? (Note The payload size is 20 bytes.)

The correct answer is C. cRTP off: 79.2 kb/s; cRTP on: 33.6 kb/s. See the full explanation below for the reasoning.

Question

On a WAN PPP link, what is the required bandwidth for three G.729 VoIP calls when cRTP is turned off, and what is it when cRTP is turned on? (Note The payload size is 20 bytes.)

Options

  • AcRTP off: 72.6 kb/s; cRTP on: 24.6 kb/s
  • BcRTP off: 90 kb/s; cRTP on: 36 kb/s
  • CcRTP off: 79.2 kb/s; cRTP on: 33.6 kb/s
  • DcRTP off: 26.4 kb/s; cRTP on: 11.2 kb/s
  • EcRTP off: 48 kb/s; cRTP on: 24 kb/s

How the community answered

(16 responses)
  • B
    6% (1)
  • C
    75% (12)
  • D
    6% (1)
  • E
    13% (2)

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