Hi
@TayZaLinZaw,
For some time now, 3CX has stopped allowing calls to be initiated using the Make Call component by first dialing the external number. The call must always be connected to an internal extension first. This is a problem for your use case.
SIP Caller is a cloud-based dialer that easily integrates with 3CX, enabling operation in the described scenario. But it's not just that. With SIP Caller you will have a solution ready to use out of the box, which will give you a user friendly management console, so you can define your call flows (how to interact with your customers), create campaigns, specify operation hour, upload numbers to call, and much more. You will have a real time dashboard to see what's going on (calls being made, campaigns progress, etc.), and historical reports (call by call details and also charts with useful metrics).
You can start a free trial for your customer
here, and get it working with their 3CX in minutes. If you think this is what your customer needs, you can also
sign up as a SIP Caller partner, and resell it to your customer, getting a discount, an NFR license, and more.
Let me know if you have any questions.