D-Phone Business APP D-Phone Business is a multi-tenant cloud-based software as a service solution for deploying a call-center system for your organization. Feature: - Secure voice call via SIP over WebSockets - Mobile App / Web Phone / Landline call supported Demo Account / Pricing : please contact osd_support@osd.co.th https://www.facebook.com/osdcompany/ อ่านเพิ่มเติม