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Question 459 - 350-801 discussion

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Refer to the exhibit.

Which codec should an engineer select for a call made between "Dallas-REG' & "Austin-REG'?

A.

MP4A-LATM

Answers
A.

MP4A-LATM

B.

G.711

Answers
B.

G.711

C.

OPUS

Answers
C.

OPUS

D.

G.729

Answers
D.

G.729

Suggested answer: D

Explanation:

The codec preference list for the "Dallas-REG" region is "Factory Default low loss". This list includes

the following codecs in order of preference:

G.729

G.711

OPUS

MP4A-LATM

The codec preference list for the "Austin-REG" region is "Factory Default low loss". This list includes

the following codecs in order of preference:

G.729

G.711

OPUS

MP4A-LATM

Since both regions have the same codec preference list, the codec that will be used for a call made

between "Dallas-REG" and "Austin-REG" is G.729.

G.729 is a narrowband speech codec that was developed by the ITU-T in 1988. It is a low-bitrate

codec that provides good quality speech at a bitrate of 8 kbps. G.729 is widely used in VoIP

applications and is the default codec for many VoIP systems.

G.711 is a wideband speech codec that was developed by the ITU-T in 1972. It is a high-bitrate codec

that provides excellent quality speech at a bitrate of 64 kbps. G.711 is not as widely used as G.729

due to its high bitrate requirements.

OPUS is a lossy audio codec that was developed by the IETF in 2012. It is a low-bitrate codec that

provides good quality speech at a bitrate of 6 kbps. OPUS is widely used in VoIP applications and is

the default codec for many VoIP systems.

MP4A-LATM is a lossy audio codec that was developed by the IETF in 1999. It is a high-bitrate codec

that provides excellent quality speech at a bitrate of 24 kbps. MP4A-LATM is not as widely used as

G.729 or OPUS due to its high bitrate requirements.

asked 10/10/2024
Jason Kelley
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