A remote office has a less-than-optimal WAN connection and experiences packet loss, delay, and jitter.
Which VoIP codec should be used in this situation?
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A. B. C. A. E. A. G.D.
https://community.cisco.com/t5/collaboration-voice-and-video/summary-of-cucm-supported-codecs/ta-p/3162905In a scenario where a remote office has a less-than-optimal WAN connection with packet loss, delay, and jitter, it is important to select a VoIP codec that is resilient to these network impairments. VoIP codecs are responsible for encoding and compressing audio data to transmit over the network.
Out of the given options, the most suitable codecs in this scenario are iLBC and G.729A, as they are designed to work well in low bandwidth and high packet loss environments.
iLBC (Internet Low Bitrate Codec) is a narrowband codec that was specifically designed for use over IP networks. It was created to handle network impairments such as packet loss, delay, and jitter, making it an ideal codec for use in remote offices with suboptimal WAN connections. iLBC uses a unique dual-bandwidth coding scheme that allows it to adapt to network conditions and still provide good voice quality.
G.729A is a low-bitrate codec that also provides good voice quality in low bandwidth environments. It is designed to work well with packet loss and delay by using techniques such as silence suppression and error concealment. G.729A uses a bit rate of 8 kbps, making it a good choice for remote offices with limited bandwidth.
In comparison, 711ulaw and 722.1 codecs are not well-suited for low bandwidth and high packet loss environments. 711ulaw is a high-bitrate codec that provides excellent voice quality, but requires more bandwidth than iLBC and G.729A. 722.1 is a wideband codec that is designed for use in high-quality audio environments, but requires more bandwidth than iLBC and G.729A.
In summary, iLBC and G.729A are the most suitable VoIP codecs for use in a remote office with a less-than-optimal WAN connection and network impairments such as packet loss, delay, and jitter.