Direct distance dialing information

Direct distance dialing (DDD) is a telecommunication service feature in North America by which a caller may, without operator assistance, call any other...

Direct dialing may refer to: Direct distance dialing, where a caller may call any other user outside the local calling area without operator assistance...

commenced a customer trial of direct distance dialing (DDD) from this single location in the country. From the customer dialing experience in the Englewood...

Mexico City, and Tijuana. In the early development of International Direct Distance Dialing (IDDD), Mexico elected to join World Zone 5, instead of joining...

comprehensive numbering plan that enabled direct-distance dialing, led to the introduction of all-number dialing in the 1960s. The use of numbers starting...

planning for a nationwide numbering plan for Operator Toll Dialing and direct distance dialing (DDD) in the Bell System in the United States in the 1940s...

exist in previous decades, especially in small towns and before direct distance dialing became universal. In the late 1990s, the 7-digit landline numbers...

exchanges a long distance apart. Since all calls may be dialled direct today, the term has fallen into disuse. In subscriber trunk dialing, each designated...

transmitting the direct-current pulses of a rotary dial. Operator Toll Dialing was gradually supplemented and superseded by Direct Distance Dialing (DDD) in the...

select pulse dialing or DTMF dialing. AIOD leads (automatic identified outward dialing) Crossbar switch Dial tone Direct distance dialing (DDD) History...

also the first area code with Direct Distance Dialing (DDD) service, when in 1951 the first direct-dialed long-distance call was made from Englewood,...

they gained public recognition with gradual implementation of Direct Distance Dialing in the 1950 and 1960s. Starting with the late 1980s, assignment...

code 1, which is dialed as a prefix in the international E.164 telephone numbering plan. The trunk prefix for dialing long-distance calls, across numbering...

designed for use in Operator Toll Dialing, the reorganization was also a prerequisite for Direct Distance Dialing (DDD) by customers, first implemented...

service area for new numbers, making ten-digit dialing mandatory in the area, with eleven-digit dialing necessary from landlines. San Francisco Bel Marin...

direct-distance dialing, all-number calling became necessary. Similar developments followed around the world, such as the British all-figure dialling...

long-distance calling, by reducing manual labor by switchboard operators. Eventually, it prepared the continent for direct-dialing of long-distance calls...

customer-dialed communication in 1951, with the first trial of Direct Distance Dialing (DDD). In 1956, the administration divided the state into two numbering...

codes. With the build-out of the toll dialing system, and the beginnings of conversion for direct distance dialing by subscribers, AT&T divided the numbering...

year earlier. Permissive dialing for all calls in 609 began on January 20, 2018, and ended August 18 when ten-digit dialing became mandatory. The area...

Toll Dialing. The state of Florida was a single numbering plan area with area code 305. In 1953, with the development of Direct Distance Dialing, the...

Articulation score Blue box - a device that was used to bypass the normal long-distance call switching tones typically used to obtain free calls. Call originator...

Kenya with IT education and training Direct distance dialing, a method for telephone subscribers to call long-distance numbers without operator assistance...