Labeled Line Buttons For Behind Switch Telephones - AT&T MERLIN LEGEND System Reference Manual

Functional Description
Line Access
Figure 4-7

Labeled Line Buttons for Behind Switch Telephones

The bottom button on each telephone is reserved for the Prime Line coming
from the host system. The outside lines appear on the labeled line buttons
above the Prime Line. In this figure, the first line (5678) is assigned to buttons on
both telephones, and the second (5679) is assigned to a button only on the
second telephone.
The following features are not available on a Behind Switch system:
trunk pools
Automatic Route Selection (ARS)
queued call consoles (QCCs) and associated features
System Access buttons
Multibutton telephones are most commonly used in Behind Switch mode. Single-
line telephones can also be used and can be setup in two ways. In the first way,
the user has constant access to the Prime Line but cannot make intercom calls
or use system features. In the second way, the user can make and receive
intercom and Prime Line calls and can use system features, but the user must
dial a dial-out code to make an outside call.
When the Behind Switch mode is chosen in system programming, the system
assigns a single Prime Line and an Intercom Voice and Intercom Ring button to
each telephone. When a user lifts a handset, the Prime Line is automatically
selected (even when it is busy) unless the user selects a different button before
lifting the receiver. The Prime Line connects only with the host system, not an
outside line.
To call another person connected to the host system, the user dials the host
system extension number assigned to that person. To access outside lines, the
user dials the host system's dial-out code (usually a 9), and the host system
selects an available outside line from its pool.
Modes of Operation 4-19