Are you using VOS3000?

Meet M4 SBC, the alternative to VOS3000 for VoIP providers who want a more user-friendly and reliable Class 4 Softswitch for managing VoIP billing and routing more efficiently.


Technical Support

M4 SBC VOS3000
M4 was developed in the European Union. The main language used by Kolmisoft’s analysts for technical support is English.

The average response time during working hours is 15–20 minutes. Kolmisoft also offers 24×7 support for emergencies.

VOS3000 was developed in China and English-speaking customers often find it challenging to communicate with the Chinese support team.



M4 SBC VOS3000
M4 has an intuitive and user-friendly web interface. The platform is simple and easy to use, and you can learn the configuration basics very quickly. This saves you time and improves the user experience, especially when training new staff. VOS3000 does not have a web management interface, so you can’t access it from a remote location. In addition, administration is complicated. Systems are configured with a Windows-based desktop client.



M4 SBC VOS3000
Kolmisoft uses Fail2Ban, which protects M4 against brute force attacks and suspicious activity. M4 also allows you to easily block IPs and entire countries. You can also configure alerts, which help you to prevent various hacking attempts, even if the hacker tries to attack your client. Read more about security in M4. Cracked versions of VOS3000 are very popular in the market, and the system is highly vulnerable. Some security holes are well known to VoIP hackers. If you don’t configure the firewall properly, you can be hacked within minutes of opening your system to the public internet.



M4 SBC VOS3000
Invoicing is done easily in M4 by clicking just two buttons: “Generate Invoices” and “Send Invoices by Email.” You cannot generate invoices in VOS3000.


Staff Permissions

M4 SBC VOS3000
You can set up access permissions for your staff using the Managers functionality. VOS3000 does not allow you to limit access by your staff.



M4 SBC VOS3000
M4 has flexible routing and supports various routing modes. Read more about the M4 routing logic. VOS3000 has very limited routing capabilities.


Currency Exchange

M4 SBC VOS3000
M4 is a multi-currency system that supports automatic currency exchange. You can operate with only one currency in VOS3000.


Selling A-Z Termination

M4 SBC VOS3000
You can easily offer A-Z termination as well as individual routes. It’s almost impossible to manage A-Z termination due to their bad reporting system.


Feedback about VOS3000 from its users


Feedback about VOS3000 from its users


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!