300-070 · Question #414
Which codec settings does Cisco Unified Communications Manager support for software conference bridges?
The correct answer is C. G.711. CUCM software conference bridges only support the G.711 codec, unlike hardware DSP-based bridges which can handle additional codecs.
Question
Which codec settings does Cisco Unified Communications Manager support for software conference bridges?
Options
- AG.722
- BG.723
- CG.711
- DG.729
How the community answered
(38 responses)- A3% (1)
- B3% (1)
- C95% (36)
Why each option
CUCM software conference bridges only support the G.711 codec, unlike hardware DSP-based bridges which can handle additional codecs.
G.722 is a wideband codec that requires hardware DSP resources and is not supported by software conference bridges in CUCM.
G.723 is not a supported codec for any CUCM conference bridge type, software or hardware.
G.711 (both mu-law and a-law variants) is the only codec supported by CUCM software conference bridges because they run entirely on the server CPU without dedicated DSP resources. The absence of DSP hardware limits software bridges to uncompressed G.711 audio. Any conference requiring compressed or wideband codecs must use a hardware conference bridge with DSP resources instead.
G.729 is a compressed codec that requires DSP hardware for encoding and decoding, making it unavailable on software conference bridges.
Concept tested: CUCM software conference bridge codec support
Source: https://www.cisco.com/c/en/us/support/docs/voice-unified-communications/unified-communications-manager-callmanager/200443-CUCM-Conference-Bridge-Types-and-Configur.html
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