Epson WorkForce AL-MX300DN - Manual (Page 25)

Rear view
a security slot b network interface connector
c USB interface connector d telephone interface connector *
- LINE: Connects with the phone cord
- EXT: Connects with an external telephone
e power switch f AC inlet
g cover B
* DNF model only
AL-MX300 Series User's Guide
Getting to Know Your Printer 25