Strange internal calls

[Big-Foot]

The past few days we have an issue with the 3CX server.
Phones randomly ring and actually receive internal phone calls from extension 100

When you pickup there is nothing but silence and hanging up doesn't work. The line keeps busy for al rather long time.

01/21/2018 12:19:13 PM MAYET (100) ---- (103) 00:00:32
01/21/2018 5:44:34 AM MAYET (100) VMail (100) 00:00:32
01/21/2018 5:44:04 AM MAYET (100) RG ---- (800) Not Answered
01/21/2018 3:32:28 AM MAYET (100) VMail (100) 00:00:32
01/21/2018 3:31:58 AM MAYET (100) RG ---- (800) Not Answered
01/21/2018 1:01:35 AM MAYET (100) VMail (100) 00:00:32
01/21/2018 1:01:04 AM MAYET (100) RG ---- (800) Not Answered

what is MAYET?

and why is our system in 12 hour modes instead of the European 24hour
doesn't make it easer to troubleshoot.

 

[eddv123]

Hi Big-Foot,

Sounds like you maybe getting ghost calls as a result of a possible hack attempt.

What phones are you using ? Yealink have covered solving this issue in their FAQ's:
http://support.yealink.com/faq/faqInfo?id=181

 

[JasonNadeau]

100% ghost calls from sipvicious.
Accept sip trust ctrl must be on if in a yealink phone. Other manufacturers sometimes something along the lines of: accept requests only from reg server".