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Category:VoIP Faults: Difference between revisions
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These scans result in your phone ringing with a strange caller ID, but when you answer, there's no one there because it's not a real call.
* To stop them, look for a setting in your phone such as "Direct IP calls" or 'Accept SIP Trust Server Only' eg, [[VoIP_Phones_-_Yealink_DECT#Other_optional_settings Yealink Phones]] have this option.
* Also review your [[VoIP Security|Firewall]], and check you're only allowing VoIP traffic from the A&A servers.
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