Editing Media access unit (section)

==Fault tolerance==
Multistation Access Units contain relays to short out non-operating stations. Multiple MAUs can be connected into a larger ring through their ring in/ring out connectors.<ref>{{foldoc|Media+access+unit}}</ref><ref>{{cite web|url=ftp://service.boulder.ibm.com/networking/nswww/neteam/int_hubs.pdf|title=LAN Hub Sales Guide|author=IBM|archive-url=https://web.archive.org/web/20200616170933/ftp://service.boulder.ibm.com/networking/nswww/neteam/int_hubs.pdf|archive-date=2020-06-16|url-status=dead|date=1997}}</ref>

An MAU is also called a "ring in a box". The loop that used to make up the ring of the token Ring is now integrated into this device. In Token Ring, when a link is broken in the ring, the entire network goes down; however with an MAU, the broken circuit is closed within 1ms; allowing stations on the ring to have their cords unplugged without disabling the entire network.