78Appendix C: SpecificationsNote: Specifications are subject to change without notice.Print MethodImpact dot matrixPrinthead9 pins, 0.30 mm (0.0118") diameter, with thermalprotectionInterfacesStandard: Centronics parallel, IEEE-1284 compliantUSB 1.1Optional: RS-232C SerialEthernet Print Servers:6120i 10/100 Base-T, Internal6020e 10/100 Base-T, External6010e 10 Base-T, ExternalReceive Buffer SizeMaximum 128KReliabilityRibbon Life4 million characters, on average, 10 cpi utilityPrinthead Life400 million characters average in 10 cpi utility mode at25% duty and 35% page densityMean Time Between Failures (MTBF)20,000 hours at 25% duty cycle and 35% page densityMean Time to Repair (MTTR)15 minutes
