The fax machine's user guide is also a good source of information. You can often find a copy of the user guide online. Just do a Google search for "[brand name and model number] fax machine user guide."
Here are the basic steps:
1. Unplug the phone cord from the digital phone modem and plug it into the fax machine.
2. Reset your phone modem using the 'Reset' button on the back of the device.
3. Allow at least 60 seconds for the device to complete the reset cycle.
4. Using your cell phone, call your phone number/fax number and see if the fax machine picks up.
5. Send outgoing fax.