Need to increase the speed of printer to Bixolon kitchen printer

We recently installed some Bixolon SRP-275III impact printers (ethernet) and they print very slowly. The customer immediately asked about increasing the speed. We usually use Epson, but have had trouble finding inventory.

Anyway, I spoke with Bixolon and they are telling me there is no way to change it when using ethernet and that any change in speed would have to come from the POS so I wanted to put this out there and see if anyone has any ideas or if there is something that can be done on the software side.