![Yeastar Client Add-on for MyPBX U520 Yeastar Client Add-on for MyPBX U520](https://cdn11.bigcommerce.com/s-u3uxlvxq3h/images/stencil/400x400/products/9088/26379/YST-U520-CLIENT-2__48715.1584438134.jpg?c=1)
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Billing system add-on for the Yeastar MyPBX U520 phone system. The application provides real-time billing information, prepaid and postpaid payment options, detailed extension statistics and call logs, and much more. Easily keep track of customers and accounting.