I had an existing Jetdirect EW2400 on a Design Jet 500 that I love. I have another design jet that I wanted to hook up so i ordered the Jetdirect EW 2500 as the EW2400 is no longer made. Unfortunately I learned the hard way that HP killed the support within the EW2500 for designjet 500's..
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Does not work with HP designJet 500 printers