Beginning March 1, 1970, an International direct-dial service became available from New York City, NY, USA to London, England. This project was a joint venture between the American Telephone & Telegraph Company (AT&T) and the British General Post Office. In our opinion, the start of Telecommunication Globalization..
March 1, 1970
Telegraph Company (AT&T)
British General Post Office
New York City,
- International direct dialing – Wikipedia
International direct dialing (IDD) or international subscriber dialling (ISD) is placing an international telephone call that is dialed directly by a telephone subscriber, rather than by an telephone operator.
- Long-distance calling – Wikipedia
In telecommunications, a long-distance call or trunk call is a telephone call made to a location outside a defined local calling area. Long-distance calls are typically charged a higher billing rate than local calls.
- Direct distance dialing – Wikipedia
Direct distance dialing (DDD) is a telecommunication service feature in which a caller may, without operator assistance, call any other user outside the local calling area.