If a phone is off-hook or the phone speaker is enabled and nothing is dialed for a configured time period in seconds, a defined extension is automatically dialled.

Use this feature in unmanned reception areas or for door-entry systems to allow visitors to easily gain assistance – visitors who know the desired number have the option to dial it, while other visitors can be routed to assistance after a short time-out. This feature can also be used as an emergency alert in a health care environment, for example, when a handset is lifted but no digits are dialed.