The NEC DSX 22B Phone 1090020 DX7NA-22BTXH is a business phone from the NEC DSX series, designed for professional use. With a sleek black color, this conventional system phone features 12 lines and an interface for DSL/Phone connections (RJ-11). The model number DSX-22B DX7NA-22BTXH indicates its specific design within this series, making it a reliable choice for businesses looking for a high-quality communication solution.