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Based on the information provided, it sounds like there could be a few potential causes for the issue of Yealink phones continuously signing out of Teams. Here are a few possibilities to consider:
- Make sure that the Yealink phones have the latest firmware version installed. Outdated firmware could potentially cause issues with sign-in and connection stability.
- Check if the SIP Registration Timeout setting on the Yealink phones is set to a reasonable value. If this setting is too low, the phones may be signed out due to SIP registration timeouts. The recommended value for this setting is usually around 3600 seconds.
- Verify that the Teams configuration on the Yealink phones is correct and matches the settings for the Teams SIP gateway. Also, Make sure that the phones are set up to use the correct SIP domain, SIP server, and SIP port.
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