We understood your needs. We will be able to provide VoIP which is already built, the features are,
1. Handle your phone calls - Manage your phone calls directly from Odoo. Call your customers, manage a call queue, log your calls, schedule calls.
2. Call In One Click - VoIP allows you to make calls to your customers from your browser. Once your call queue is filled, select a phone number and dial it in one click.
3. Automate Calls - Automate calls and increase the amount of phone numbers you ring. You don't need to dial the number anymore, process the call queue in one click. After one call is finished and logged, the next call is automatically triggered.
4. Log Calls - Keep a history of all your calls. After each call, the log window is opened. You can reschedule a call, define a new action or describe the call.
5. Send Email And Transfer Calls - The panel lets you transfer the call or send an email to the customer. For emails, you can use templates created by the sales team. You can also easily find and use information on customers or opportunities.
Kindly, let us know your feedback on this. We will do the best for you.