The screen on your fax machine displays how the machine is set to receive calls. TEL MODE means the machine will not auto-answer incomming calls and will operate as a normal telephone device, it will still however be able to send a fax in this setting.
Place your message on the original tray and pick up the handset, dial the number and when the distant machine answers press the start key or ask for their fax machine and when you hear the high pitched fax tone press start.
There is a button on the panel that will allow you to change the reception mode of your machine to the other settings.
Your machine is of a model that doesn't come into this country so I have no manuals to forward you. You can try however to access the SHARP web site www.sharp.ae
Hope this helps you