I just purchased a Laserjet Pro M521dn and a Jetdirect 2700w. However, the M521dn only has one USB port which does not recognize the Jetdirect. However, the Jetdirect 2700w is listed as an accessory for the M521.
Does the Jetdirect 2700w work with the M521dn?
Is there a hidden usb port on the back of the printer I am not finding?