AT&T MERLIN LEGEND Release 4.0 Feature Reference page 241

Feature Reference
In Hotel mode, when Auto Dial buttons are used to monitor the status of
telephones (instead of buttons on a DSS), the green LED next to the button
indicates extension status (0, 1, or, 2) and the red LED indicates message
status. In calling group mode, the green LED also indicates extension status,
but the red LED indicates busy/not busy status.
If the system is programmed for Extension Status in Hotel mode, telephones can
be changed to Status 0 (regular call handling) only from the operator console.
Extension Status cannot be changed from rotary telephones.
In hotel mode, when the system restarts (for example, for maintenance) and the
calling group type is set for Auto Logout (see "Group Calling" for details),
extensions that are assigned Status 1 are changed automatically to Status 0
and restrictions are removed. If the calling group type is changed to Auto Login,
extensions assigned Status 1 are changed automatically to Status 2 and
restrictions remain.
Telephone Differences
Direct-Line Consoles
Extension Status/Supervisory Operation can be assigned to DLCs only. In Hotel
mode, only a DLC operator can change an extension to Status 0. In Calling
Group/CMS mode, a calling group or CMS supervisor uses a DLC to monitor
and change group member status.
Queued Call Consoles
Extension Status/Supervisory Operation cannot be used on a Queued Call
Console (QCC), and a QCC cannot be a calling group or CMS supervisor
console or a calling group member.
Multiline Telephones
Only a telephone assigned as a DLC can activate Extension Status/Supervisory
Operation to see the status of telephones. In Hotel mode, the feature is
assigned to the console in system programming and is always active on the
console unless the operator presses the Message Status button to use the Auto
Dial or DSS buttons to see message-waiting status for each telephone.
To activate Extension Status/Supervisory Operation in Calling Group/CMS
mode, the calling group or CMS supervisor assigned as a DLC presses the
Feature button, dials
and return to normal call handling, the supervisor presses the Feature button,
dials , and presses the Drop button.
, and presses the Hold button. To deactivate the feature
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Extension Status