Are you looking for an alternative to Cirpack Softswitch?

Meet M4 SBC, the alternative to Cirpack Softswitch for VoIP providers who want a more user-friendly and reliable Class 4 Softswitch for managing VoIP billing and routing more efficiently.


Wondering where to start?

Here are some useful resources:


Ready to try M4 SBC seriously?

Sign up for the Pilot project and you‘ll get:

  • Installation on your server or on Kolmisoft dedicated servers
  • Technical support and assistance with configurations
  • Fully functional MOR system with the complete feature set

Still have questions? Contact us and we’ll be glad to assist!