VoIP telephony is cheaper overall than ISDN because IP connections have lower rental costs. It is possible to get cheap or free UK landline calls, as well as cheap mobile call costs, discounted international calls, and free calls within a company’s network.
VoIP calls are cheaper and more flexible than ISDN lines in terms of the phone numbers you can have and the locations.
Company employee can have their desk calls forwarded to their smartphones or PCs for no extra charge. In an emergency, you can re-route calls to a different location.
Voice over Internet Protocol (also known as VoIP, IP telephony, internet telephony and cloud IP telephony) is a broad term that describes voice calls made over the internet rather than using the Public Switched Telephone Network (PSTN).