300-085 · Question #160
Which codec is supported in Cisco Unity Express?
The correct answer is A. G.711. Cisco Unity Express supports only the G.711 codec for voice encoding, as it is the standard PCM codec compatible with the platform.
Question
Which codec is supported in Cisco Unity Express?
Options
- AG.711
- BG.721
- CG.729
- DQ.850
- EQ.931
- FQ.2931
How the community answered
(15 responses)- A87% (13)
- D7% (1)
- F7% (1)
Why each option
Cisco Unity Express supports only the G.711 codec for voice encoding, as it is the standard PCM codec compatible with the platform.
G.711 is the standard PCM audio codec supported by Cisco Unity Express for recording and playing back voice messages over the router's DSP resources. CUE uses G.711 as its voice codec for voicemail and auto-attendant functions because it requires no additional compression processing. G.729, while used in IP telephony for bandwidth efficiency, is not supported by CUE.
G.721 is not a recognized or widely deployed audio codec standard and is not supported by Cisco Unity Express.
G.729 is a compressed codec used in IP telephony to conserve bandwidth but is not supported as a recording or playback codec in Cisco Unity Express.
Q.850 is an ISDN cause code standard used in call signaling to indicate call release reasons, not an audio codec.
Q.931 is an ISDN Layer 3 signaling protocol used for call setup and teardown, not an audio codec.
Q.2931 is an ATM signaling protocol derived from Q.931, used for virtual circuit setup, not an audio codec.
Concept tested: Cisco Unity Express supported voice codec
Source: https://www.cisco.com/c/en/us/products/collateral/unified-communications/unity-express/product_data_sheet0900aecd800fa759.html
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