AT&T MERLIN LEGEND System Reference Manual page 253

Features
Coverage
Direct-Line Console
Directory
Disallowed Lists
Display
Group Calling
Headset Options
Inspect
Multi-Function Module
Paging
2-204 H o l d
Coverage calls answered by any type of receiver can be put on hold. The Hold
Reminder applies to any calls put on hold on a Primary Cover, Secondary
Cover, or Group Cover button.
When programmed system wide, DLC Operator Automatic Hold puts an active
call on hold when the DLC system operator presses another line button. When
One-Touch Hold is programmed system wide, pressing an Auto dial button or
DSS button also puts an active call on hold. This prevents accidental
disconnection of callers and speeds call handling.
The DLC system operator hears an abbreviated ring as a reminder of a call on
hold every time the interval programmed for the Operator Hold Timer (10-255
seconds) expires.
The Hold button is pressed to enter the Pause special character in a directory
listing telephone number.
The Hold button is used to enter a wild card character in a Disallowed List entry.
When a user with an MLX telephone has a call on hold for a longer period of
time than the programmed Hold Reminder, a message appears on the display.
On a queued call console (QCC) only, when held calls return to the queue after
the second hold reminder, returning held calls are identified by call type and by
the name and extension number of the system operator who put the call on hold.
The second line of the QCC display also shows the caller information.
A calling group member who put a call on hold using the Hold button is
considered unavailable for incoming calls. A user waiting in the calling group
queue cannot put the call on hold.
Headset Auto Answer is automatically deactivated when an MLX telephone user
puts a call on hold.
If the user presses the Hold button while Inspect is activated, Inspect is
canceled and the system tries to put the call on hold.
Calls cannot be put on hold on an MFM since the system ignores the switchhook
flash.
A Speakerphone Paging call can be put on hold by the originator only. However,
when Speakerphone Paging is used to make an inside voice-announced call,
either the originator or the person being called can put the call on hold.