Instruction manual

Features
Key and Behind Switch Modes
Only DLCs (not QCCs) are allowed in Key and Behind Switch modes.
A DLC operator cannot select lines that are not assigned to buttons on the
console.
Telephone Differences
Direct-Line Consoles
An MLX-20L assigned as a DLC can also be used for system programming by
connecting it to any of the first five station jacks on the first MLX module and
designating the station jack for system programming. The Home screen of the
MLX-20L and MLX-28D is the same as that of non-operator telephones.
The built-in DSS field on the MERLIN II System Display Console corresponds to
physical station jacks in the control unit instead of specific extension numbers in
the numbering plan. Therefore, DSS buttons on the MERLIN II System Display
Console cannot be used to monitor the busy status of trunk pools or the busy
status of a Calling Group.
An analog DLC cannot be used for system programming; however, System
Speed Dial numbers, the system date, and the system time can be programmed
from an analog DLC connected to the first analog station jack when the module
with that jack is in slot 01 of the control unit.
Queued Call Consoles
All “Dial 0” calls are directed to the QCC queue and do not ring at any DLC
positions. A DLC cannot use Position Busy, which is used only for QCCs. A
DLC cannot be assigned as a Position Busy backup for a QCC (only Calling
Groups can provide backup for a QCC).
Feature Interactions
Alarm
The DLC operator uses an Alarm button to monitor system
operation. The red LED next to the Alarm button on the system
operator console goes on when the system detects a problem
that requires immediate attention. A system operator with a
digital DLC can use Inspect to display the number of alarms; a
system operator with an analog DLC cannot use Inspect.
On a system with fewer than 29 lines, an Alarm button is
assigned by default to analog DLCs with 34 or more buttons.
On a system with more than 29 lines, Alarm is replaced with line
30. The Alarm button is not a fixed feature and can be
assigned to any available button on an analog or MLX DLC.
124 Direct-Line Console