Publicly Available Telephone Service. A service available to the public for originating and receiving national and international telephone calls and access to Emergency Organisations and in addition may, where relevant, include one or more of the following services: the provision of operator assistance services, Directory Enquiry Facilities, Directories, provision of Public Pay Telephones, provision of service under special terms, provision of specific facilities for End-Users with disabilities or with special social needs and/or the provision of non-geographic services.