AT&T MERLIN LEGEND Calling Group Supervizor's Manual page 27

Calling Group Supervisor Telephones
ICOM Originate Only.
calls; you will not receive calls on it.
555-1234. Use any button labeled with a phone number to
make or receive outside caIls only. It is a direct outside line
to your phone, like your phone at home. If a phone number
appears on your phone or a specific group of phones, it is
called a "personal line." Calls to the calling group do not come
in on these lines.
WATS. Buttons labeled with special service names like WATS
connect you directly with outside lines for making or
receiving outside calls at a reduced cost. Calls to the calling
group do not come in on special service lines.
only to make inside
Use this button
Buttons on Your Phone 2-13