It is important to note that a network design starts with a logical framework that shows the connections required between devices to ensure viable exchange of information between networked devices. The logical framework is important but the customer will find that a physical network design is equally important because it highlights the distances between the connected devices and the media that is to be used with the required connectivity end-points, bonding and grounding points. The physical design quickly points to the need to aggregate the connection points into distribution nodes (Distributors - as shown in the TIA 1005A star topology) and the cabling sub-systems needed. Two possible cabling sub-systems choices are used in the architecture; Fiber cables for all horizontal runs (normally over 100 meters in length) and copper for all vertical runs, within work cells, and all connections to the Edge points and devices.