Sharp UX-CD600 Operation Manual page 19

Setting Up
Connecting the phone lines
If you have two phone lines, both lines can be connected to the machine. The
phone lines can be used simultaneously. For example, you can make a phone
call using the machine's handset on line 1 while sending a fax on line 2, or
make simultaneous phone calls using one cordless handset on line 1 and
another cordless handset on line 2.
♦
Line 1 is primarily for phone calls. Line 2 is primarily for fax.
If you are connecting two lines:
Two-line jack: If you have a two-line phone jack (RJ-14C), insert one end of
the provided telephone line cord into the two-line jack and the other end into
the jack on the machine marked LINE 1/2.
Single-line jacks: If you have two single-line jacks (RJ-11C), connect one
end of the provided line cord to the LINE 1/2 jack on the machine and the
other end to the single-line jack that you wish to use as line 1 (line 1 is
primarily for phone calls). Connect one end of an additional line cord (not
included) to the LINE 2 jack on the machine and the other end to the single-
line jack that you wish to use as line 2 (line 2 is primarily for fax).
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