AT&T MERLIN LEGEND System Reference Manual page 302

Features
Direct-Line Console
Direct Station Selector
Display
Do Not Disturb
Forward and Follow Me
Headset Options
Hold
Inspect
Microphone Disable
Multi-Function Module
Personal Line
The line/trunk jack programmed as a loudspeaker paging port can be assigned
to a button on an analog or digital DLC for one-touch access. A system operator
with a digital DLC can also access a loudspeaker paging system by dialing the
line/trunk number (801-880) for the line/trunk jack on which the loudspeaker
paging system is connected.
A DSS button for a line/trunk programmed as a loudspeaker paging port is used
only to indicate whether the paging system is in use and cannot be used to gain
access to the loudspeaker paging system. A DSS button can be used only to
dial an extension for a paging group.
When a DSS button for a paging group is pressed, the transfer process is not
automatically initiated even if One-Touch Transfer (DLC only) or automatic
Extended Call Completion (QCC only) is programmed for the system.
When users with MLX display telephones use Group Page, they see a message
on the display indicating the number of the paging group.
Speakerphone paging calls cannot be made to a telephone with the Do Not
Disturb feature activated.
Calls cannot be forwarded to a paging group. The line/trunk number used to
connect loudspeaker paging equipment cannot be used to forward calls to
outside telephone numbers.
A user with a headset hears Group Speakerphone Paging over the speaker phone.
A speakerphone paging call can be put on hold by the caller or, when used to
make an inside voice-announced call, by the person being called.
If the user gets a voice-announced inside call or a Group Speakerphone Page
while using the Inspect feature, the Inspect feature is canceled and the user is
returned to the Home screen.
Calls made to Speakerphone Paging Groups can still be heard over telephones
whose microphones are disabled.
An MFM should not be a member of a speakerphone paging group.
A line/trunk used for loudspeaker paging equipment cannot be assigned as a
personal line.
Paging 2-253