DESC: Cortelco Kellogg is noted for setting the standard of excellence in single-line telephones. In fact, they are one of the largest manufacturers of U.S.-made telephones.??The Patriot 2191 telephones are fully modular, desk or wall mountable, tone / pulse switchable, and hearing-aid compatible. It includes ringer volume control; equipped with a flash button, last number redial button, data port, directory card and a 90-volt message waiting capability. 2191 has pause and release buttons as well as 20 memory locations. The Patriot series is available in fingerprint resistant, matte finish in black or pearl gray colors.