Autonomous Registration

From CDGWiki

Autonomous Registration

a.k.a. Power-up registration, timer-based registration

A timer-based registration mode in which the MS periodically registers with the network without requiring action to be taken by the subscriber. This feature allows a roamer whose MS is turned on to be automatically registered for call delivery and validation without receiving or placing a call and without having to dial a star (*) code.

Note that while power-up registration and timer-based registration are different mechanisms, they are both types of autonomous registration.