Teams calling and meeting signaling uses DSCP 40 (CS5) on UDP source ports 50070-50089, and those ports are not currently configurable.
Checked 2026-10-02
- Vendor
- Microsoft
- Product
- Microsoft Teams
- Subsystem
- QoS
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- Implement Quality of Service in Microsoft Teams — Microsoft · tier 2 current vendor documentation · Step 3. Choose initial port ranges for each media type, table and footnote
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting voice QoS markings that are stripped or ignored: source note voice-qos-troubleshooting-teams-signaling-cs5. WarmTransfer. https://warmtransfer.net/knowledge/claims/voice-qos-troubleshooting-teams-signaling-cs5
BibTeX
@misc{warmtransfer-claim-voice-qos-troubleshooting-teams-signaling-cs5,
title = {Troubleshooting voice QoS markings that are stripped or ignored: source note voice-qos-troubleshooting-teams-signaling-cs5},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/voice-qos-troubleshooting-teams-signaling-cs5},
note = {Source note voice-qos-troubleshooting-teams-signaling-cs5, checked 2026-10-02}
}