A. Performance enhancementAdding memoryFor the fax modem option to take advantage of RAM added toyour printer beyond the standard eight megabytes, a “Restore tofactory defaults” should be preformed at the printer afteradditional RAM is installed. This is done by simultaneouslypressing the Reset/R and Pause/P keys at the printer controlpanel.A maximum of 20 MB of memory can be installed in your printer.When you fax and print at the same time, or when you send andreceive complex faxes, additional memory provides increasedperformance.N Note: 4220/MRP and 4230/MRP standard baseconfiguration is 20 MB RAM.Adding a hard diskTo ensure a maximum amount of space for PostScript-to-PostScript file transmissions using the fax modem, a high-capacityhard disk can be added to your printer.Installing a hard disk in the printer also allows you to spool faxjobs.XEROX MRP FAMILY FAX MODEM FOR MACINTOSH OPERATOR GUIDE A-1