The Astra 6731i VOIP Phone by Aastra is a business phone set designed for use in a VoIP system. It features a DSL/Phone interface option, making it compatible with traditional phone lines. The specific model, ASTRA 6731i, offers reliable and high-quality communication for offices and businesses looking to streamline their telecom systems. With its sleek design and user-friendly features, the Astra 6731i VOIP Phone is a great choice for those looking to enhance their business communication capabilities.