Voip

Voip I work primarily with small and medium businesses, is it a problem to replace the contact form with some VoIP application such as WhatsApp?
I work primarily with small and medium businesses, is it a problem to replace the contact form with some VoIP application such as WhatsApp?
What is VoIP and how does it work?Who uses VoIP?What protocol does VoIP use?What is VoIP call? What is VoIP and how does it work?VoIP services conve...