350-801 · Question #262
350-801 Question #262: Real Exam Question with Answer & Explanation
The correct answer is D: 87.2 kbps. All details match with G711 protocol, for which the calculation is : (160+(40+18))/160 x 64 =87.2 kbps Codec Information Bandwidth Calculations Codec & Bit Rate (Kbps) Codec Sample Size (Bytes) Codec Sample Interval (ms) Mean Opinion Score (MOS) Voice Payload Size (Bytes) Voice P
Question
An engineer implements a new Cisco UCM based telephony system per these requirements: - The local Ethernet bandwidth is sized based on the total bandwidth per call - A G.736 codec is used. - The bit rate is 64 kbps - The codec sample interval is 10 ms. - The voice payload size is 160 bytes per 20 ms. What should the size of the Ethernet bandwidth be per call?
Options
- A31.2 kbps
- B38.4 kbps
- C55.2 kbps
- D87.2 kbps
Explanation
All details match with G711 protocol, for which the calculation is : (160+(40+18))/160 x 64 =87.2 kbps Codec Information Bandwidth Calculations Codec & Bit Rate (Kbps) Codec Sample Size (Bytes) Codec Sample Interval (ms) Mean Opinion Score (MOS) Voice Payload Size (Bytes) Voice Payload Size (ms) Packets Per Second (PPS) Bandwidth MP or FRF.12 (Kbps) Bandwidth w/cRTP MP or FRF.12 (Kbps) Bandwidth Ethernet G.711 (64 Kbps) 80 Bytes 10 ms 4.1 160 Bytes 20 ms 50 82.8 Kbps 67.6 Kbps 87.2 Kbp
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