AT&T 982 - Manual (Page 11)

5 Check for dial tone.
Press
L, lift the handset, press K or press h
(with a headset connected and batteries installed), and listen for
a dial tone. Then press
l, lift the handset, press K or
press
h (with a headset connected and batteries installed),
and listen for a dial tone. If you cannot hear a dial tone, turn to
IN CASE OF DIFFICULTY beginning on page 22.
NOTE: If you press
h when there is no headset connected to
the phone but charged batteries are properly installed, you will hear a
warning tone. If you did not install batteries, the headset feature will
not work at all.
6 Confirm Lines 1 and 2 (if you installed this phone
with two lines).
To determine which line is which, press
L and call one of
your telephone numbers. If you hear a busy signal, Line 1 is the
number you called. If Line 2 rings, it is the number you called.
NOTE: This product is designed to operate optimally with two
telephone lines. If you choose to install only one telephone line, the
phone will continue to operate normally as long as the unused line is
not selected. If you experience difficulty, make sure you have pressed
the correct LINE button.
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