One of the critical advantages of VoIP telephone systems is their cost-effectiveness. Unlike traditional phone systems that rely on separate networks for voice and data, VoIP uses the internet to transmit voice data, eliminating the need for expensive infrastructure. This results in significant business cost savings, particularly in long-distance and international calls. Moreover, VoIP systems are highly scalable, allowing businesses to add or remove lines easily as their needs change, without the hassle of physically rewiring or purchasing additional hardware.