Can two token ring stations be directly attached?
Unlike Ethernet stations, token ring stations _cannot_ be directly attached with a cross-over cable. Because of the process required for inserting into a ring, a loopback process must complete and phantom voltage must exist on a wire for a relay to open. A MAU must be used to directly connect two workstations. However, some token ring switches allow a station to directly connect to a _switch_. This Direct Token Ring (DTR) connection is a non-standard method of connecting a switch and a workstation onto a single ring. This non-standard DTR connectivity does _not_ allow for two workstations to be directly connected.
