AT&T MERLIN LEGEND System Reference Manual page 361

Features
Feature Interactions
Callback
Call Waiting
Coverage
Direct-Line Console
Do Not Disturb
Ringing Options
Queued Call Console
System Access
System Programming
2-312 Reminder Service
With Reminder Service Cancel, the user can program the system to cancel
all outstanding reminders automatically at a preset time every day.
Reminder Service cannot be used on MLC-5 cordless telephones.
Reminder Service calls cannot be queued by using Callback.
Reminder Service calls are not eligible for Call Waiting.
Reminder Service calls are not eligible for Individual or Group Coverage.
DLC system operators can use Reminder Service to set or cancel reminders for
other users. The system operator can also see when a reminder was missed
and cancel missed reminders. The Missed Reminder button can be
programmed on system operator positions only.
Reminder calls ring at telephones with Do Not Disturb activated.
A Reminder Service call overrides programmed ringing options (delayed and no
ring) and rings with a priority ring at an Intercom or System Access button.
Reminder Service cannot be used on a QCC.
A Reminder Service call overrides programmed ringing options (Delayed Ring
and No Ring) and rings at the principal station; Reminder Service calls do not
ring at Shared System Access buttons.
Activate or deactivate Reminder Service Cancel.
Options -> Remind Svc