telephone bank1
/ˈtɛlɪfəʊn ˌbaŋk/originally and chiefly US
noun
An array of telephones used by an organization, company, etc., for political campaigning, canvassing opinion, receiving customer calls, etc.
Origin
1960s; earliest use found in The New York Times. From telephone + bank.
telephone bank2
/ˈtɛlɪfəʊn ˌbaŋk/Banking (chiefly British )
noun
A bank which (usually primarily or solely) offers telephone banking.
Origin
1980s; earliest use found in Marketing. From telephone + bank.