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:
“We are nothing but ceremony; ceremony carries us away, and we leave the substance of things; we hang on to the branches and abandon the trunk and body.”
—Michel de Montaigne (15331592)