Direct Distance Dialing

GPTKB entity

Statements (19)
Predicate Object
gptkbp:instanceOf gptkb:telecommunications_company
gptkbp:abbreviation gptkb:DDD
gptkbp:category Telephony
Telecommunications history
gptkbp:enables Long-distance telephone calls without operator assistance
https://www.w3.org/2000/01/rdf-schema#label Direct Distance Dialing
gptkbp:introducedIn gptkb:United_States
gptkb:Englewood,_New_Jersey
1951
gptkbp:regulates gptkb:Federal_Communications_Commission_(FCC)
gptkbp:relatedTo Direct Inward Dialing
Operator-assisted calling
gptkbp:replacedBy Manual long-distance calling
gptkbp:requires Touch-tone or rotary dial telephone
gptkbp:usedBy Telephone subscribers
gptkbp:uses Area codes
Numbering plan
gptkbp:bfsParent gptkb:DDD
gptkbp:bfsLayer 6