Refactor device docs

docs/models/dcim/cable.md

@@ -0,0 +1,19 @@
+# Cables
+
+A cable represents a physical connection between two termination points, such as between a console port and a patch panel port, or between two network interfaces. Cables can be traced through pass-through ports to form a complete path between two endpoints. In the example below, three individual cables comprise a path between the two connected endpoints.
+
+```
+|<------------------------------------------ Cable Path ------------------------------------------->|
+
+  Device A                   Patch Panel A                 Patch Panel B                  Device B
++-----------+               +-------------+               +-------------+               +-----------+
+| Interface | --- Cable --- | Front Port  |               | Front Port  | --- Cable --- | Interface |
++-----------+               +-------------+               +-------------+               +-----------+
+                            +-------------+               +-------------+
+                            |  Rear Port  | --- Cable --- |  Rear Port  |
+                            +-------------+               +-------------+
+```
+
+All connections between device components in NetBox are represented using cables. However, defining the actual cable plant is optional: Components can be be directly connected using cables with no type or other attributes assigned.
+
+Cables are also used to associated ports and interfaces with circuit terminations. To do this, first create the circuit termination, then navigate the desired component and connect a cable between the two.