A button set to this function allows the user to save the number dialed during a call and to redial that number when idle. This can be used when the number dialed does not answer.

If an extension already has a button set to this function, creating another button with this function will automatically clear the setting from the existing button.

For analog telephone devices, when using last number redial, saved number redial, system speed dial and personal speed dial features no dial tones for the digits dialed are played to the caller.