The Teams test utilizes the sensor's underlying TCP ping capability by sending 100 TCP pings and tagging the pings with the appropriate DSCP/TOS field for voice. Based on the latency, jitter, and packet loss, the sensor computes a Mean Opinion Score (MOS) in accordance with ITU-T Recommendation G.107.
The test target for Teams is the media relay for Microsoft Teams—worldaz.tr.teams.microsoft.com. For VoIP MOS tests, DSCP tag 48 is mapped to VoIP traffic on Wi-Fi, and DSCP tag 46 is mapped to VoIP traffic on Ethernet.
The test provides latency, jitter, packet loss, and MOS values, which range from 1 to 4.4. The following guide to MOS values can be used to determine VoIP quality:
4.4: Best score possible
4.3 – 4.4: Users very satisfied
4.0 – 4.3: Most users satisfied
3.6 – 4.0: Some users satisfied
3.1 – 3.6: Many users dissatisfied
2.6 – 3.1: Nearly all users dissatisfied
1.0 – 2.6: Not recommended
Since Skype for Business Online was retired on July 31, 2021, we recommend replacing your Skype for Business test with this new test.
This test was updated on May 30th, 2024. The previous test target stopped responding to TCP pings and was replaced by worldaz.tr.teams.microsoft.com.
VoIP MOS Tests & Proxies
It's not typically possible to ping through a proxy. Therefore, a VoIP MOS test won't be executed on a proxied network unless the “Force TCP Ping” flag is explicitly set in that network’s settings. This option is disabled by default and is not recommended. It should only be enabled if the ping goes directly, bypassing the proxy.
