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How to block “ghost calls” coming in from 100,1000,10000 on your Yealink phones

The symptoms :  Phones will ring with 100,1000, or 10000 as the caller-ID and no one will be on the other end. It could happen just once just like it could happen many times a day, every day. Inspecting the logs of your phone system or voip provider will not show these calls at all.These calls are being mass made by a so called “sip auditing tool” called SipVicious. It will scan en...
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