A Cisco UCM location between a client's headquarters and branch office is configured for 512 kbps of audio bandwidth and 384 kbps of video bandwidth. What is the maximum number of G.711 calls…

The correct answer is A. 6. To determine the maximum number of G.711 calls that can be supported over a link with a specific bandwidth allocation, we need to consider the bandwidth consumption of each G.711 call, including overhead. 1. G.711 Codec Bandwidth Requirements: A G.711 call requires 64 kbps for…

Media and QoS

Question

A Cisco UCM location between a client's headquarters and branch office is configured for 512 kbps of audio bandwidth and 384 kbps of video bandwidth. What is the maximum number of G.711 calls allowed through this link?

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How the community answered

(49 responses)

A
71% (35)
B
14% (7)
C
4% (2)
D
10% (5)

Explanation

To determine the maximum number of G.711 calls that can be supported over a link with a specific bandwidth allocation, we need to consider the bandwidth consumption of each G.711 call, including overhead. 1. G.711 Codec Bandwidth Requirements: A G.711 call requires 64 kbps for audio payload. 2. IP Packet Overhead: In addition to the audio payload, overhead from RTP (Real-Time Protocol), UDP, and IP headers must be considered. Including overhead, the bandwidth for a G.711 call increases to approximately 80 kbps per call. 3. Audio Bandwidth Available: The audio bandwidth for this link is 512 kbps. 4. Maximum Number of Calls: Divide the available audio bandwidth by the bandwidth required per Since partial calls are not possible, the maximum is 6 calls. By supporting 6 calls at 80 kbps each, the configuration ensures optimal use of the available 512 kbps audio bandwidth while adhering to the QoS limitations.

Topics

#G.711 codec#Bandwidth calculation#Quality of Service#Cisco UCM

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