AT&T 1782 User Manual page 10

NOTE: If a single-line phone is connected to the SET 1/(SET 2) jack, it can be used to
make and answer calls on Line 1 only.
L1/L2
Strain
Relief Tab
Standard
Electrical
Outlet
For one two-line wall jack with two single-line phones:
a Plug one end of the telephone line cord with clear plugs into the two-line wall
jack. Plug the other end into the system jack labeled L1/L2.
b Plug the line cord from the single-line phone for Line 1 into the system jack
labeled SET 1/(SET 2). This phone is connected to the Line 1 telephone number.
c Plug the line cord from the other single-line phone into the system jack
labeled SET 2.
d Go to Step 2, "Connect the power cord."
INSTALLATION
SET 1/(SET 2)
Telephone Line Cords
Telephone Jack
SET 2
Modular
7