Phaser 7400 Maintenance Firmware Release: Addresses Job Accounting and Advance Color Calibration improvements. Required for printers containing OS 6.16 / PS 3.9.0 / Net 25.30 versions. This firmware upgrades Phaser 7400 printer firmware to OS 6.26 / PS 4.2.0 / Net 25.72 version levels. This Windows version contains Readme and Firmware File.