DnD - Do Not Disturb (Telecommunication)

Do Not Disturb (DND) is a common feature in enterprise telecommunications. When it is enabled, it prevents the telephone from ringing. The implementation of this features is vendor-specific. In some cases, the ringer just does not ring and the called party is thus not alerted. Usually, though, the phone just acts as being busy. Depending on the infrastructure, the caller may end up on the called party's voice mailbox, sometimes after a certain delay.

Some special configurations combine DND with other features like call forwarding, where calls to a party with DND on are forwarded to another phone.