Grandstream IP Phones is a service that you can use when you choose VOIP and is most commonly used for businesses that rely on making calls all over the world. You do need the right equipment to provide this type of service, but when you do, your business can communicate with customers all over the world without costing the company a fortune in phone bills. Because of the internet, which allows you to easily reach people all over the world, a new technology that allows you to speak to others through VOIP can be used for making business calls from your office phone or even your mobile phone to others, regardless of where they are or what type of service they are using.