AT&T MERLIN LEGEND System Reference Manual page 345

Features
Feature Interactions
Account Code Entry
Alarm
Auto Answer All,
Auto Answer Intercom
Auto Dial
Automatic Line Selection
Barge-In
Callback
Calling Restrictions
2-296 Queued Call Console
A QCC system operator can activate Account Code Entry only by selecting the
feature from the display and not through the use of feature codes.
Normally, account codes cannot be entered when a Group Coverage call is
answered at a Coverage button programmed on a multiline telephone. However,
when the QCC queue is programmed as the receiver for a Coverage group, the
QCC system operator can enter account codes and the account code appears
on the SMDR printout. This is because Coverage buttons are not required when
the QCC queue is programmed as a receiver for a Coverage group.
An Alarm button is assigned as a fixed feature on the QCC.
Auto Answer All and Auto Answer Intercom cannot be assigned to a QCC.
Auto Dial buttons cannot be programmed on a QCC. For one-touch dialing of
extensions, the system operator can use the buttons on a DSS or the Extension
Directory. In addition, the system operator can use the System Directory and
Personal Directory for one-touch dialing of outside numbers.
Automatic Line Selection on a QCC is a fixed sequence that starts at the lower
Call button and moves upward. The sequence cannot be changed.
Barge-ln enhances call handling by allowing the QCC system operator to
contact a person who is busy on a call or using Do Not Disturb. The use of
Barge-In does not override Privacy. On a QCC, Barge-In can be used only by
pressing the Feature button and selecting it from the display.
Barge-In can be used to join only an inside call to a QCC system operator and
only if the caller's extension number is dialed instead of the QCC system
operator's extension number. If a user tries to use Barge-In after dialing a QCC
system operator's extension and while waiting in the QCC queue, the feature
has no effect and the user hears an error tone. If the error tone times out while
the call is still in the QCC queue, the call is disconnected. However, if a QCC
system operator becomes available before the error tone times out, the error
tone is removed and the call is delivered to the system operator normally.
Calls to QCCs are not eligible for Callback since the calls ring into the QCC
queue. Callback cannot be used on a QCC.
Calling restrictions can be assigned to QCCs. Since restrictions apply to the
telephone used to initiate a call transfer to an outside number, a user with a
restricted telephone can circumvent restrictions by asking a system operator
with an unrestricted console to connect an outside call.