Avaya developed the amazing Avaya IP Office 500V2 office phone systems to bring to all sized businesses a truly innovative solution that’s able to cover a multitude of different applications. This system is designed to be infinitely scalable and suitable for small businesses, up to the corporate needs of large businesses that require the ability to cater for up to 2000 users at one time. Being versatile and cost effective are important issues for all businesses today, so they created three versions, the basic edition that caters for most small business needs, the Avaya essential edition as well as the Avaya preferred edition.