Subscriber trunk dialling (STD, also known as subscriber toll dialling) is a term for a telephone system allowing subscribers to dial trunk calls without operator assistance.
Read more about Subscriber Trunk Dialling: Terminology, Explanation, History
Famous quotes containing the word trunk:
“through the Sumner Tunnel,
trunk by trunk through its sulphurous walls,
tile by tile like a men’s urinal,
slipping through
like somebody else’s package.”
—Anne Sexton (1928–1974)