AT&T 993 2-Line - Manual (Page 38)

Telephone operation
35
Options while on calls
Hold
While on a call, press HOLD. The LINE light for the call
will flash slowly while the call is on hold. You can replace
the handset in the cradle without disconnecting the
line and the speakerphone or headset is automatically
disabled.
To release hold and return to the call:
Press the
LINE button for the call.
The call will automatically be reconnected in the original
mode (speakerphone or headset), or you can lift the
handset. The
LINE light for the call remains on steadily
when you release HOLD.
For information about automatic line selection, see Turn
automatic line selection on or off on page 20.
Switch between lines during a call
During a call on one line, you can make or answer a call
on the other line by pressing
HOLD. You can use the
HOLD and LINE buttons to switch back and forth between
calls as often as necessary.
Example: While using line , line 2 rings:
. Press
HOLD to hold line .
2. Press LINE 2 to answer the other call.
3. Press LINE 1 to hang up line 2 and return to the first
call.
— OR —
Press
HOLD to hold line 2, and press LINE 1 to return to
your first call.
NOTE: If you switch lines without pressing HOLD first, you will
disconnect the call.