Call is hanging up exactly 21 seconds into every call

My Softphone is hanging up exactly 21 seconds into every call, incoming or outgoing. I can't figure out how to fix it.

• It's possible your internet isn't connecting to the RTP ports (UDP 10000-65000).
• Our your MicroSip is not configured correctly.

Solution

• Go to MicroSip's Settings and edit the fields Source Port and RTP Ports.

• If you already have the previous configuration and it still doesn't work, try this one.

• If you MicroSip Status is connecting, try this one.

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