A Point to Point Protocol link running PPP Multilink Protocol with multi-class extensions having both peers on the PPP link support a number of egress priority queues negotiated during the Multilink-Extension negotiation. At least one surface of the visualization section has a roughness that does not interfere with a video capture system of an optical imaging device. For each pair of planarly adjacent divisioncombination branches, a corresponding first uncoupling resistor is coupled between corresponding intermediate nodes and a corresponding second uncoupling resistor is coupled between the corresponding second ports. A memory circuit stops application of the write voltage to a memory cell during the test period, and applies the write voltage to the memory cell after end of the test period. A facsimile machine start button is then operated to start the facsimile machine which scans documents provided therein and transmits the scanned data in a conventional facsimile transmission format or activate the PC to transmit a fax in conventional facsimile transmission format to utilize the facsimile machine as a printer.