Avaya IP Office is an all-in-one solution specially designed to meet the communications challenges facing small and medium sized businesses. Due to its modular design, the solution can scale from 2 to 360 extensions to meet the needs of home offices, standalone businesses, and networked branch and head offices. Built on Avaya's latest advancements in converged voice and data technology, small to mid-sized businesses can benefit from many of the advantages sophisticated communications deliver to their operations. IP Office supports a wide range of telephones but the 5400 series Digital phones and the 5600 series IP phones have been specifically designed to work with IP Office and provide small and medium sized businesses with a choice of solutions to meet business efficiency and customer service requirements.