Media access unit

A media access unit (MAU), also known as a multistation access unit (MAU or MSAU), is a device to attach multiple network stations in a star topology as a Token Ring network, internally wired to connect the stations into a logical ring (generally passive i.e. non-switched and unmanaged; however managed Token Ring MAUs do exist in the form of CAUs, or Controlled Access Units).

"MSAU" redirects here. For the settlement in the Coast Province, see Msau.
Not to be confused with Medium Attachment Unit.

Passive Token Ring was an active IBM networking product in the 1997 time-frame, after which it was rapidly displaced by switched networking.

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