Patent ID: 7679762

Claim:
A print system in which a printer and a client personal computer are connected to a network, wherein: said printer comprises: a paper feed cassette having residual quantity detection means of sheets of paper, a storage section for storing an updated residual quantity information of sheets of paper as MIB (management information base) information, a communication mechanism for transmitting said residual quantity information of sheets of paper to said client personal computer upon request of said client personal computer, a printing unit, and said client personal computer obtains said MIB (management information base) information from said printer using an SNMP (simple network management protocol), comprising: a generation unit for generating print data corresponding to a print job and a control unit for inputting said residual quantity information of sheets of paper and calculating a number of sheets of paper necessary for said print job and comparing said residual quantity information and said number of sheets of paper necessary, and when judging an occurrence of exhaustion of sheets of paper according to a comparison results, notifying it to a user before sending said generated print data to said printer.