AT&T MERLIN LEGEND Release 4.0 Feature Reference page 58

Feature Reference
Considerations and Constraints
Outside line buttons and SA or ICOM buttons can be included in the ALS
sequence. However, inside and outside lines should not be interleaved. A
typical sequence would consist of all desired SA or ICOM buttons, followed by
all desired outside line buttons.
When personal line or Pool buttons are assigned to a single-line telephone or
other tip/ring device (such as a fax machine) connected to an 012 module, an
016 module, or a Multi-Function Module (MFM), the buttons are automatically
added to the ALS sequence.
When a user or system manager enters ALS programming, the system clears
the current ALS sequence for the extension. If the person programming the
extension exits without selecting any buttons, the extension has no ALS
sequence. The effect is as if Idle Line Preference is turned off: no line is
selected automatically when the user lifts the handset to place a call.
Mode Differences
Hybrid/PBX Mode
The factory-set ALS sequence for multiline and single-line telephones includes
only SA buttons. Users can make outside calls by dialing the main pool dial-out
code (usually
In Release 3.0 and earlier systems, the factory setting is for users to have
access. In Release 3.1 and later systems, the factory setting is for users to not
have access to pools or Automatic Route Selection. To use the main pool dial-
out code, the user must have access to that pool programmed by the system
manager.
Key Mode
The factory-set ALS sequence for multiline telephones (including DLCs)
includes only personal line buttons. Users can make inside calls by pressing an
available ICOM button before dialing.
The factory-set ALS sequence for single-line telephones includes only ICOM
buttons. Users can make outside calls by dialing the Idle Line Access code
(usually ).

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Automatic Line Selection and Ringing/Idle Line Preference
) or Automatic Route Selection code (usually

).