Back Side
Additional telephone line jack (LINE 2/LINE 3/LINE 4)
Use LINE 2 to connect the Super G3 2nd Line Fax Board to the machine, and use LINE 3 and LINE 4 to connect the Super G3 3rd/4th Line Fax Board to the machine. System Options
Telephone line jack (LINE 1)
Connect a telephone cable when connecting the machine to a telephone line.