AASTRA DT590 for MD Evolution User Guide EN - Manual (Page 136)

Audible Signals
MD Evolution – Cordless DT590 266
Service Acceptance tone
Heard when a request for service is accepted on your extension.
Multi-toned melody, continuous
Appointment Reminder notification
Heard following your response to an appointment reminder, this
announcement indicates the nature of this automatic system call.
See section “ More Features on your Extension ” on page 234
Message: “It’s time for your appointment.”.