Cisco's phone guidance treats MOS LQK changes of about 0.2 or more that persist in calls longer than 30 seconds as significant, and advises using the metrics as a baseline for comparison.
Checked 2026-09-22
Significant changes are scores that change about 0.2 MOS or greater and persist in calls that last longer than 30 seconds.
- Vendor
- Cisco
- Product
- Cisco IP Phones on Unified CM
- Subsystem
- Voice quality monitoring
- Deployment
- on-premises
- Region
- not restricted
- Release range
- current as of 2026-09-22
- Checked
- 2026-09-22
Sources
- Cisco Wireless IP Phone 8821 and 8821-EX Administration Guide for Cisco Unified Communications Manager - Maintenance — Cisco Systems · tier 2 current vendor documentation · Maintenance chapter, section Voice Quality Monitoring, troubleshooting guidance
Cite this note
APA
WarmTransfer. (2026, September 22). CUCM call management records (CMR) fields and the CDR relation: source note cucm-call-management-records-significant-change. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-call-management-records-significant-change
BibTeX
@misc{warmtransfer-claim-cucm-call-management-records-significant-change,
title = {CUCM call management records (CMR) fields and the CDR relation: source note cucm-call-management-records-significant-change},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-call-management-records-significant-change},
note = {Source note cucm-call-management-records-significant-change, checked 2026-09-22}
}