In 1959 the public "red phone" and "blue phone" are joined by a new service, the 'Special Simplified Public Telephone.' Nicknamed the "pink phone," these new public phones enable ordinary subscriber lines to be used as public telephones, and are installed as a service to customers in high-traffic areas such as apartment buildings, hospitals and coffee shops. Not purely public telephones, the "pink phones" can be placed inside buildings in any location the subscriber desires.