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Collaboration, Voice & AV · Intermediate

Teams Media Port Ranges

Microsoft's recommended Teams client source ports and DSCP values for audio, video and screen sharing QoS.

Definition

Microsoft recommends audio on client source ports 50000-50019 marked EF (46), video on 50020-50039 marked AF41 (34) and application sharing on 50040-50059 marked AF21 (18). Media to Microsoft relays uses UDP 3478-3481. QoS markings on Windows clients are applied through Group Policy or Intune policies, since the client cannot be trusted alone.

Example

A GPO policy-based QoS rule marks Teams.exe traffic from source ports 50000-50019 as DSCP 46.

Exam tip

Know the three ranges and DSCP values, and that UDP 3478-3481 must be allowed outbound.

Related terms