👉 In telecommunications, a "undialled" number is one that has not been dialed and does not have any associated service or connection. This can be useful in emergency situations or for maintaining contact with people who may not be available during normal business hours. Undialled numbers are often used to avoid unnecessary calls and to keep lines open for those in need. They can also serve as a backup for dial-up connections, especially if there is a network outage.
