Cloud telephony has stopped, no incoming or outgoing calls
Cloud PBX (Teams Phone, 3CX, Microsoft 365 Business Voice, etc.) depends on internet and MFA. One of those two is usually the cause.
Try this first
- 1Test your internet: open a news site, a speed test, any web page. If internet is down, calls are too.
- 2Close the calling app fully and reopen; the SIP registration often stays stuck on an old session.
- 3Sign out of your work account in the calling app and back in. Then test an internal extension.
- 4On Teams Phone: Teams > Calls > Devices and confirm your headset or speaker is selected.
When to bring us in
If multiple colleagues see the same at once, it is at the provider or at our side. Email us and we escalate to the telco.
See also
- Work and personal apps blur together on the same phoneAndroid Enterprise and iOS-with-Intune can enforce a work profile, isolating business apps in a separate container.
- Setting up Microsoft 365 on a new phoneOutlook, Teams, and OneDrive run smoothest if you install Authenticator first and sign the others in afterwards.
- Moving Authenticator to a new phoneMicrosoft Authenticator has built-in cloud backup. Run it before wiping the old device, otherwise everything has to be re-added by hand.
None of the above fits?
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