How to permanently set Epson WF 3620 to double-sided printing
How to permanently set Epson WF 3620 to double-sided printing
iPhone 5s, iOS 8.2
How to permanently set Epson WF 3620 to double-sided printing
iPhone 5s, iOS 8.2
This question would not have anything to do with AirPort networking with the AirPort Express, AirPort Extreme or Time Capsule.
Epson support would have the answer that you seek......something like this:
How to permanently set Epson WF 3620 to double-sided printing