What I'm meaning is that the printer does not lose connection to the router (this is confirmed by the indicator lights on the printer). In addition, laptops can connect to the network without problem. The communication issue is between the laptops and the printer.
The internet connection is used by the printer so remote printing can be achieved. Email an attached doc directly to the printers unique email address and it prints. This function works OK (also proving that it's direct network connection is present).
No, no ethernet connectivity, just wireless or USB.