Cisco 805 Hardware Installation Manual page 10

Terms and Acronyms
equivalent hub button can affect the setting of this router button, refer to the
"Connecting an Ethernet Device" section in Chapter 2, "Installing the Cisco 805
Router."
link
Indicates that a connection between the router and an Ethernet device exists.
MDI
Media-dependent interface. A port on a Ethernet network device used to connect the
device to the Ethernet network, usually through a hub or switch.
MDI-X
Media-dependent interface, crossover. A port on an Ethernet hub, such as the Cisco
1528 Micro Hub 10/100, that connects the Ethernet network devices through the MDI
port to create a network.
NIC
Network interface card. A board that provides network communication capabilities to
and from a computer system. Also called an adapter.
SELV
Safety extra-low voltage. A secondary circuit that under normal conditions has a voltage
less than 42.4V peak or 42 Vdc. Under a single fault condition, this circuit should not
exceed these values for longer than 0.2 seconds and should not exceed 71V peak or
120 Vdc.
straight-through Ethernet cable
A cable that wires a pin to its equivalent pin. This cable typically connects a router to a
hub. A straight-through Ethernet cable is the most common cable used.
TNV
Telecommunications network voltage. A secondary circuit that under normal operating
conditions, carriers telecommunication signals. Telecommunications signals are a
steady state, varying amplitude, or intermittent voltage or current intended for use on a
telecommunications network. A telecommunications network is considered a
metallically terminated circuit intended to carry telecommunication signals for voice,
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Cisco 805 Router Hardware Installation Guide