Ring no answer in my calls status

I have many calls with the status "ring no answer" in my agent reports.

[[File:|300px|link=|caption]]

If your problem persist

If any configutation works, contact us via email (itis.cmsupport@softtek.com) sharing with us:

-Client's name

-Your location

-Your Internet service provider (ISP)

-Your Public IPv4 (https://checkip.amazonaws.com/)

-Your Extension number

-Screenshot of MicroSip's Settings (Ctrl+P)

-Screenshot of MicroSip's Account (Ctrl+M)

-Describe your issue