Yealink SIP-T22 features intuitive user interface and enhanced functionality which make it easy for people to interact and maximize productivity. With TI leading VoIP voice engine, it enables enhanced high-fidelity audio,outsourced management options, flexible deployment and third-party communications applications. As a cost effective IP solution, it helps users to streamline business processes, delivering a powerful and consistent communications experience for small and large offices environment. 3 Lines - It supports up to 3 VoIP accounts, each with a standalone configuration. HD Voice Quality - It supports advanced wideband voice codec G.722 and full-duplex hands-free speakerphone with enhanced AEC, delivering superior voice clarity. Business Professional Phone - 3 programmable function keys and 4 soft keys, XML Phonebook, which increase working efficiency.