AT&T Merlin Legend 10BS User Manual page 39

Your Analog Multiline Telephone
.
SA Originate Only. Use this button only to make calls; calls
do not come in on this button. To make an outside call on this
button, enter a dial-out code (usually a 9) before dialing the
phone number. This button is set up by your company to
make either inside ringing or voice-announced calls (not
both).
Shared SA. Use these buttons to answer calls for coworkers
and to join their conversations. Each button is linked to a
specific SA button on a co-worker's phone. Shared SA
buttons are labeled either Shared SA Ring or Shared SA
Voice, depending on which type of inside calls the button
allows you to make. You can use these buttons to make and
receive inside and outside calls, just like your own SA Voice
and SA Ring buttons. These buttons are set up by your
company.
555-1234. Use any button labeled with a phone number to
make or receive outside calls only. This is called a
"personal line" because it appears only on your phone or a
specific group of phones. It is a direct outside line that does
not need a dial-out code.
Pool. Use this button to make and receive outside calls.
You may have a different label on one or more of these
buttons; consult your system manager for an explanation of
their purpose and use.
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Line Buttons