Installation Guide for the Model FE508 and Model FE516 Fast Ethernet Hubs
C-4
Fast Ethernet and Cabling Guidelines
Twisted-pair Cables
For two devices to communicate, the transmitter of each device must be connected to the receiver of
the other device. The cross-over function is usually implemented internally as part of the circuitry in
the device. Some repeaters and switch ports are media-dependent interfaces with cross-over ports,
referred to as MDI-X or Normal ports. Computers and workstation adapter cards are usually media-
dependent interface ports, referred to as MDI or Uplink ports. Refer to the installation instructions in
Chapter 3, “Installation,” for appropriate cable use and connection.
Figure C-1 illustrates straight-through twisted-pair cable connections and Figure C-2 illustrates cross-
over twisted-pair cable connections.
Figure C-1. Straight-through twisted-pair cable
Figure C-2. Cross-over twisted-pair cable
