IBM 09N9970 16/4 Mk2 PCMCIA Madge Token Ring adapter card provides 16 Mbps Token Ring connectivity for laptops and portable systems with PCMCIA Type III slot support. Part number 09N9970 is compatible with IBM ThinkPad and other enterprise portables from the mid-to-late 1990s requiring Token Ring network access. The Madge chipset delivers reliable frame forwarding and supports standard 802.5 Token Ring topologies operating at both 4 and 16 Mbps speeds. Typical deployments included legacy IBM mainframe connectivity, manufacturing floor networks, and enterprise LANs where Token Ring was the standard. The card occupies a single PCMCIA slot and draws minimal system resources. This unit has been tested and guaranteed; available via quote.