Refer to the exhibit. An engineer is troubleshooting a codec negotiation issue where both endpoints that are involved in the call support the codecs listed in the exhibit. Which audio codec is…

The correct answer is A. G722. In CUCM, when both endpoints reside in the same Region, the codec used is determined by the Region's intra-region codec preference setting. G.722 is a wideband (HD voice) codec that provides higher audio quality than G.711 (narrowband) and G.729 (low-bandwidth compressed). CUCM…

Cisco Unified Communications Manager (CUCM)

Question

Refer to the exhibit. An engineer is troubleshooting a codec negotiation issue where both endpoints that are involved in the call support the codecs listed in the exhibit. Which audio codec is selected if a call between two endpoints in Region 1 is placed?

Exhibits

Options

AG722
BG729
CG711a
DG711u

How the community answered

(40 responses)

A
70% (28)
B
8% (3)
C
18% (7)
D
5% (2)

Explanation

In CUCM, when both endpoints reside in the same Region, the codec used is determined by the Region's intra-region codec preference setting. G.722 is a wideband (HD voice) codec that provides higher audio quality than G.711 (narrowband) and G.729 (low-bandwidth compressed). CUCM prefers the highest-quality codec that is supported by both endpoints and permitted by the Region configuration. Since both endpoints in Region 1 support G.722 (as shown in the exhibit) and the Region is configured to allow it, CUCM selects G.722 as the best available codec. G.729 would only be chosen if bandwidth constraints forced a lower-quality codec, and G.711 variants would be selected only if G.722 were not mutually supported or not permitted by the Region.

Topics

#codec negotiation#regions#G.722#audio codec selection

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