What is IP telephony and what are its major functions

IP telephony is a widely-known technology. Every PC user connected to the internet got used to making phone and video calls with their computer. Conventional telephony is the service of the past. Many cellular providers bear losses because they are not as essential as they were before. Internet providers are on the top today because they provide telephony and television beside an internet access.
To let people communicate by means of the internet, IP telephony uses Voice Over Internet Protocol. It allows packaging voice stream into a digital signal to be transmitted over the web. VOIP allows combining phone calls, video conferences, and sharing multimedia files. IP telephony provides optimization and simplification of phone calls and related services. It cuts costs for provider’s services and offers a broader range of services to users. Traditional phone systems are very limited taking into account the present-day demand. They cannot satisfy customers who live in the digital world anymore.
IP telephony is the best solution for businesses. Providers offer voicemail, automated attendant, unified messaging for efficient peer-to-peer communication. Businesses do not have to support two separate networks if they can purchase everything they need from the internet provider. It means lower startup costs for new entrepreneurs and quicker ROI achieved within 12-18 month after installation. The benefits to individual clients are also vast. Deploying IP network at home, we easily give up any standard telephone network.