how to connect fax machine to cable modem
If you are connecting your fax machine directly to your Home Phone modem, or MTA. 1  Plug in the fax machine. 2  Connect one phone line from the port on the fax machine labeled Line or Line In to the MTA's Telephone port. 3  If you have one Home Phone line, use the port for Line 1. Connect one phone line from the wall phone jack to the port on the fax machine labeled Line. 2  Connect a second phone line from the port on the fax machine labeled Ext or Tel to the phone.