Delivery traffic indication map. A special type of traffic indication map (TIM) element in a beacon frame that occurs only when a station in a basic service set (BSS) is in power-save mode. A DTIM indicates that any buffered broadcast or multicast frames are immediately transmitted by an AP (AP).

(Delivery Traffic Indication Message) - A message included in data packets that can increase wireless efficiency.

a countdown informing clients of the next window for listening to broadcast and multicast messages

a signal sent as part of a beacon by an access point to a client device in sleep mode, alerting it that a packet of data awaits delivery