DNT (Do Not Track) is a privacy feature that allows users to request that websites do not track their browsing activities, though compliance by websites is often voluntary.
Do Not Call (DNC) refers to regulations that prohibit telemarketers from calling individuals who have registered their phone numbers on a national or company-specific “Do Not Call” list.
DSP (Digital Signal Processor) is a specialized microprocessor designed to process and manipulate digital signals, such as audio and video, in real time for telecommunications or multimedia applications.
DTMF (Dual Tone Multi-Frequency) is a signaling method used in telecommunication systems where pressing a phone’s keypad generates two simultaneous tones to communicate the dialed number to the system.
DTMF (Dual Tone Multi-Frequency) is the tone-based signaling system used by telephones, where each button on the keypad produces two distinct frequencies to send numbers to a switch or PBX system.
Dual tone multi-frequency signaling is the technology behind telephone keypads, generating specific tones when buttons are pressed to communicate with automated systems or telephone networks.