Voice Over Internet Protocol (VoIP) phone systems.
Greater flexibility, work remotely, as long as there is a stable Wi-Fi connection.
Lower your costs, you don't have to sign lengthy contract, acquire phones with fixed minutes so not to overrun and paying out-of-contract expenses.
Unified communications - Allow all your communications to be made from one device, Omni channel features to IM, call, conference with ease. This can also be beneficial for businesses that have international offices. You can have a head office anywhere.