CUCM documents K-factor scores as ranging from 1 (poor voice quality) to 5 (very good voice quality).

Checked 2026-09-24

measurements of average user annoyance range from 1 (poor voice quality) to 5 (very good voice quality)
Vendor
Cisco
Product
Cisco Unified Communications Manager
Subsystem
CMR varVQMetrics
Deployment
on-premises
Region
not restricted
Release range
Release 15 and SUs
Checked
2026-09-24

Sources

Cite this note

APA

WarmTransfer. (2026, September 24). Call quality metrics and MOS estimation: source note call-quality-metrics-cucm-kfactor-range. WarmTransfer. https://warmtransfer.net/knowledge/claims/call-quality-metrics-cucm-kfactor-range

BibTeX

@misc{warmtransfer-claim-call-quality-metrics-cucm-kfactor-range,
  title  = {Call quality metrics and MOS estimation: source note call-quality-metrics-cucm-kfactor-range},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/call-quality-metrics-cucm-kfactor-range},
  note   = {Source note call-quality-metrics-cucm-kfactor-range, checked 2026-09-24}
}

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