Cisco Systems 806 manual GL-3

L

link LNK

LRE

Glossary

A light-emitting diode (LED) that indicates that a physical connection between the router and an Ethernet device exists.

Long-reach Ethernet. A technology that encapsulates Ethernet packets for robust, high-frequency transmission over telephone wiring, and extends the distance reach from 100 meters for traditional Ethernet over copper to up to 5,000 feet (1,524 meters).

M

MDI

MDI-X

Media-dependent interface. A port on an Ethernet network device used to connect the device to the Ethernet network, usually through a hub or switch.

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.

modem	Modulator-demodulator. A device that converts analog and digital signals. At the
	source, a modem converts digital signals to a form suitable for transmission over
	analog communication facilities. At the destination, analog signals are converted
	back to their digital form.

S

SELV	Safety extra-low voltage. A secondary circuit that under normal conditions has
	a voltage less than 42.4V peak or 60 VDC.
straight-through	A cable that wires a pin to its equivalent pin. This cable connects two dissimilar
Ethernet cable	devices such as a data terminal equipment (DTE) and a data communications
	equipment (DCE) device. A straight-through Ethernet cable is the most common
	cable used.

	Cisco 806 Router Hardware Installation Guide
78-10432-01		GL-3