Ports and protocols

5061 Direct Routing signaling — TCP 5061 TLS to sip, sip2, and sip3

3478 Media low — UDP 3478-3481

49152 Media high — UDP 49152-53247

50000 Client audio — UDP/TCP 50000-50019, DSCP 46

50070 Client signaling — UDP/TCP 50070-50089

Taken from this lab’s ports sheet. Signaling stays with Teams. Confirm the current Microsoft list before you open a firewall.

Sources and go deeper

QoS in Microsoft Teams — Microsoft Learn — last checked 2026-10.
Prepare the network for Teams — Microsoft Learn — last checked 2026-10.
RFC 3550 — RFC — last checked 2026-10.
Quality of service — Wikipedia — last checked 2026-10. Wikipedia fallback for background. Confirm the vendor page before you change a tenant
Microsoft Teams blog index — Community — last checked 2026-10. Community index for the Microsoft Teams blog. This is the index, not a claim that a post discusses this room