Frankly speaking, I’d like to choose VoIP Telephone System;

So why? The IP communication solution( VoIP) has proved in the market that it can help us solve these questions like simplify the business procedure and reduce cost. Over years, companies all sizes have transmitted voice message, data and video communication via a general IP infrastructure;

BTW, as far as I am concerned, Cloud-Based telephone system should be more of humanization, such as adding sharing fuction, etc.