AT&T MERLIN LEGEND Release 4.0 Feature Reference page 370

Feature Reference
Telephone Differences
Direct-Line Consoles
A DLC operator can also activate Night Service by pressing the Feature button
and dialing
Service and Outward Restriction is programmed, the DLC operator does not
hear an error tone when an invalid password is entered and, unless a Night
Service button is programmed, cannot determine whether Night Service is
active.
On a system with 29 or fewer lines, a Night Service button is factory-assigned
to analog DLCs with 34 buttons or more. On a system with more than 29 lines,
the Night Service button is replaced with line 31. The Night Service button is not
a fixed feature and can be assigned to any available button on either an analog
or MLX DLC.
Queued Call Consoles
The Night Service button is factory-assigned as a fixed feature on a QCC.
If more than one QCC operator is assigned to receive calls on an individual
trunk, Night Service must be activated at all assigned positions before calls on
the trunk ring on telephones programmed as members of the Night Service
group. If Night Service is not activated by one of the QCCs programmed to
receive the calls, after-hours calls ring at that position and do not receive Night
Service coverage.
When Night Service is on, unassigned DID extension and Listed Directory
Number (operator) call types ring into the QCC queue. If these call types are
programmed not to go to the QCC queue, the caller hears an error tone when
Night Service is off. However, when Night Service is on, these call types still ring
into the QCC queue, regardless of programming.
When multiple Night Service calls are received in the QCC queue at the same
time and none of the calls are answered by a Night Service group member (all
group member SA or ICOM buttons are busy), new calls are sent to the QCC
queue and can be answered only by the QCC operator. To avoid this situation,
all outside lines assigned to ring on the QCCs should be assigned as personal
lines on at least one group member's telephone.
370
Night Service
. When a feature code is used to activate or deactivate Night