Explore: Telephone Reference Services

disorder to place calls to standard telephone users via a keyboard or assistive device. Originally, relay services were designed to be connected through

certain telephone service features. Some vertical service codes require dialing of a telephone number after the code sequence. On a touch tone telephone, the

form of lookup for listed services by phone number, along with address cross-referencing. Publicly accessible reverse telephone directories may be provided

Numbering Plan is an open telephone numbering plan with three-digit area codes and seven-digit telephone numbers that directs telephone calls to particular

Other new services provided under his leadership were GTE Mobilenet cellular telephone operations, Airfone air-to-ground telephone services, and the first

traditional solely telephone companies now function as internet service providers (ISPs), and the distinction between a telephone company and ISP has

service access varies by country. The features of toll-free services have evolved as telephone networks have evolved from electro-mechanical call switching

telephone number is the address of a telecommunication endpoint, such as a telephone, in a telephone network, such as the public switched telephone network

telephony operators. It provides infrastructure and services for public telephony. The PSTN consists of telephone lines, fiber-optic cables, microwave transmission

basic exchange telecommunications radio service (BETRS) is a commercial service that can extend telephone service to rural areas by replacing the local