Source note · Call quality metrics and MOS estimation
In CUCM CMR varVQMetrics, MLQK (MOS Listening Quality K-factor) estimates the MOS of the last 8 seconds of speech on the receive path; MLQKav, MLQKmn and MLQKmx are the running average, minimum and maximum since call start.
Checked 2026-09-24
MOS Listening Quality K-factor provides an estimate of the MOS score of the last 8 seconds of speech on the reception signal path
- 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
- Call Reporting and Billing Administration Guide for Cisco Unified Communications Manager, Release 15 and SUs - CMR Field Descriptions — Cisco Systems · tier 2 current vendor documentation · CMR field table, varVQMetrics rows MLQK, MLQKav, MLQKmn, MLQKmx
Cite this note
APA
WarmTransfer. (2026, September 24). Call quality metrics and MOS estimation: source note call-quality-metrics-cucm-mlqk. WarmTransfer. https://warmtransfer.net/knowledge/claims/call-quality-metrics-cucm-mlqk
BibTeX
@misc{warmtransfer-claim-call-quality-metrics-cucm-mlqk,
title = {Call quality metrics and MOS estimation: source note call-quality-metrics-cucm-mlqk},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/call-quality-metrics-cucm-mlqk},
note = {Source note call-quality-metrics-cucm-mlqk, checked 2026-09-24}
}