Billing Solution
One stop shop for communications and accounting
One System for Billing and Calling.
All your business needs in one place with our billing solution.
By integrating your billing software with your PBX, you no longer have to log into different systems multiple times a day — BI reports, alerts & notifications, dynamic routing and more all live in one powerful system.
Issue purchase orders, invoices and delivery orders for your customers in a few clicks. From the simplest to the most complex billing process, our billing software provides an all-inclusive solution for any industry.
The built-in flexibility allows complete customization of any billing or accounting process to fit your business — however simple or complex your setup, we'll design a flexible, customized solution that integrates seamlessly with the rest of your in-house systems.
- One login for billing and calling
- BI reports, alerts and dynamic routing in one system
- Fully customized to your existing accounting workflow

Want this for your call center?
Every Mr. VoIP tool is built around your existing 3CX setup — tell us what you're running and we'll scope it.
Get in touchOr start with our forever free 3CX APIs — no credit card required.
- 3CX-Exclusive Customization
- 10+ Years of 3CX Development
- Singapore-Based Support Team
- Part of the Cal4Care Group