AT&T MERLIN LEGEND Release 4.0 Feature Reference page 369

Feature Reference
If an extension assigned to a Night Service group has the same outside line
(personal line) as the operator console, calls to this line ring immediately at
each telephone, even if the personal line on the telephone is programmed for
Delay Ring or No Ring. If the extension does not have the outside line assigned,
the call rings on an SA or ICOM button.
When Night Service is deactivated by the system operator or automatically by
the system, extensions are reset to their programmed ringing options. When a
feature code is used to activate or deactivate Night Service and Outward
Restriction is programmed, the DLC operator does not hear an error tone if an
invalid password is entered. Unless a Night Service button is programmed, the
operator cannot determine whether Night Service is active.
When both the Night Service with Outward Restriction and Night Service with
Time Set options are programmed, the system imposes restrictions
automatically.
When Night Service with Outward Restriction and/or Night Service with Time Set
are programmed, Night Service is activated or deactivated for all operator
consoles. If Night Service groups are also programmed, Night Service cannot
be activated or deactivated for each group independently.
When Night Service with Outward Restriction is activated and a user with a
restricted extension presses a dialpad button while on a call, the call is
disconnected, the user hears a fast busy signal, and the trunk is released.
When the dialpad is used, the system assumes that the user is trying to make
an outside call, which is not allowed because of the Night Service restriction
assigned to the extension.
System operators can override Night Service with Time Set and turn Night
Service on or off manually.
Night Service with Time Set can be deactivated through system programming
for special conditions such as a midweek holiday.
An answering machine connected to a 012 module or 016 module can be set
up as a member of a Night Service group to automatically answer after-hours
calls. External alerts, such as strobes, bells, or chimes, can be connected to an
analog multiline telephone by using a Supplemental Alert Adapter or to an MLX
telephone by using a Multi-Function Module (MFM) that is a member of a Night
Service group. The external alert sounds or lights when a Night Service call
comes into that telephone.
When Night Service with Outward Restriction is used, an operator must enter a
password to manually activate or deactivate Night Service.
Changing the system time while in Night Service mode deactivates Night
Service; Night Service then must be reactivated manually.
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Night Service