MacOS 8 was shipped during the summer of 1997. MacOS 8 requires a 68040-based Macintosh, or a PowerPC Macintosh or clone. MacOS 8.1 was similar to MacOS 8, but corrected several problems. MacOS 8.1 is the last MacOS version for 68040-based Macintosh machines. MacOS 8 introduced the Internet Setup Assistant, which became the setup method recommended by OlympusNet.
Setup instructions are available here.
MacOS X Server is a specialized product, and is unlikely to need to make dialup connections with OlympusNet. Apple Internet Connection Kit installs the remaining Internet software. MacOS 7.6 and 7.6.1 were available on CD-ROM, and on floppy disk at a higher price. They are now quite hard to locate for purchase. As with MacOS 7.6 and 7.6.1, Apple Internet Connection Kit is not readily available for purchase.