AT&T UNIX Hardware Installation Manual page 19

Installing Hardware
14
7 If you have a second telephone line to be used
for data communications, plug one end of the
remaining supplied modular telephone cord into
the second modular jack.
8 Plug the other end of the supplied modular
telephone cord into the LINE 2 connector on
the back of the UNIX PC.
NOTE:
You can still use your telephone
normally as you did before attaching i t
to the UNIX PC. I f you want to use
your telephone with the UNIX PC
Telephone Manager software, you must
follow the instructions in the
AX&T
UNIXTM PC Telephone Manager User's
Guide