plural of dial tone

A telephony signal, usually in the form of a sound, used to indicate that the telephone exchange is working, has recognized an off-hook, and is ready to accept a call.

The dial of a watch or clock on which the hours have been marked with a radium compound to make them luminous

Any device for comparing a physical property of two objects, or an object with a standard.

A function on some telephones allowing a phone number to be dialed by pressing only one or two keys.

(transitive, telephony) To dial using speed dial.

(colloquial) A situation when one's cellphone makes a call from one's back pocket where its buttons are being inadvertently pressed

(colloquial) To accidentally make a call this way.

plural of dial-up

A form of on-demand transportation similar to public transit usually in areas or during times where fixed route service is not available or possible and resembling paratransit, taxi, or shuttle service in its execution.