- is the actual Data Bus, which is a shielded, twisted pair
of wires that carry the signal. The cable has an impedance
of 78 ohms.
Box Couplers and Inline
Couplers - facilitate connecting and isolating components/subsystems
to/from the main Data Bus.
Terminators - used
to terminate or "close" both ends of the bus,
typically 78 ohms.
provide an electro-mechanical interface to the bus via a
variety of concentric twinaxial type devices.
Relays - Switching devices
used to connect/disconnect portions of the data bus or selected