This definition appears very rarely
See other meanings of MSAU
Samples in periodicals archive:
Rounding out the list is Proteon's Series 90 Intelligent Hub, a 10-slot hub/router with Token Ring and Ethernet LAN/WAN connectivity, and the Series 70 Intelligent Hub, a modular IBM-compatible multi-station access unit (MAU) that accommodates a variety of media.
This option allows the direct interconnection of additional PARAGON modules, hubs or other vendors' Multi-Station Access Units (MSAUs).
The EXOS 505S CDDI controller cards provide users with data transmission performance of 100 Mbps -- nearly seven times that of standard Token-Ring LANs operating over shielded-twisted pair (STP) copper cabling and standard multi-station access units (MAUs) -- at a fraction of the cost needed to rewire a building with glass fiber.