AT&T MERLIN LEGEND Release 4.0 Feature Reference page 372

Feature Reference
Group Calling
Multi-Function
Module
Personal Lines
Pickup
Remote Access
Ringing Options
System Access/
Intercom Buttons
372
Night Service
In Release 2.0 and later, a calling group can be a Night Service group
member. If a calling group is used as a Night Service member no other
calling groups or telephones are allowed to be Night Service members.
An MFM can be a member of a Night Service group. An external alert
connected to the MFM in supplemental alert adapter operation, when
assigned to a Night Service group, can be used for supplemental
ringing for after-hours calls.
If the voice mail calling group is assigned as a member of a Night
Service group, incoming lines receive Automated Attendant treatment.
When a call is answered by the Night Service group, ringing does not
occur at a telephone with that personal line and the Night Service
coverage is used instead of the principal user's coverage.
By using Pickup, a user at another extension can answer a call ringing
at a Night Service group extension.
When shared Remote Access is assigned to a trunk, incoming calls on
that trunk receive remote access treatment only when Night Service is
activated on all operator positions that receive calls on the trunk. When
a call is received on a trunk assigned for shared Remote Access and
Night Service is not activated, the call rings at the assigned telephone,
operator console, or calling group.
When Night Service is turned on, calls received at a Night Service
group member's telephone ring immediately, even if the line buttons are
programmed for Delay Ring or No Ring. When Night Service is turned
off, extensions return to their programmed ringing options.
Night Service calls override any ringing options (Delay Ring or No Ring)
programmed for SA buttons and ring immediately. Shared SA buttons
flash and do not ring.