Table of Contents

Glossary

The 10-Mbps baseband Ethernet specification that uses two pairs of twisted-pair cabling (Category 3 or 5): one pair for transmitting data and the other for receiving data.

Asymmetric Digital Subscriber Line technology that enables high-speed transmission over the "last mile" from the service provider to the customer site.

Signal that indicates whether the ADSL line is active.

A cable that wires a pin to its opposite pin; for example, RX+ is wired to TX+. This cable connects two similar devices such as two data terminal equipment (DTE) or data communications equipment (DCE) devices.

Dynamic RAM. Dynamic RAM that stores information that must be refreshed periodically in capacitors.

Electromagnetic interference. The interference by electromagnetic signals that can cause reduced data integrity and increased error rates on transmission channels.

Electrostatic discharge. A transfer of electrostatic charge between bodies of different electrostatic potentials, such as an operator and a piece of electrical equipment. ESD occurs when electronic components are improperly handled and can damage equipment and impair electrical circuitry. ESD is more likely to occur with the combination of synthetic fibers and dry atmosphere.

The nonvolatile storage that can be electrically erased and reprogrammed so that data can be stored, booted, and rewritten as necessary.

Indicates that a physical connection between the router and an Ethernet device exists.

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.

Safety extra-low voltage. A secondary circuit that under normal conditions has a voltage less than 42.4V peak or 42VDC. 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 120VDC.

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.

A cable that wires a pin to its equivalent pin. This cable connects two dissimilar 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.

The cable used to connect a device to a telephone port.

Telecommunications network voltage. A secondary circuit that under normal operating conditions carries 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, data, or other communication. These networks might be publicly or privately owned. They might be subjected to over voltages due to atmospheric discharges or power-line failures.

With this button, you can connect hubs, servers, PCs, and workstations using the yellow Ethernet (straight-through) cable instead of using a crossover Ethernet cable, which you would need to supply. This button identifies the device that you connect to the router Ethernet port using the yellow Ethernet cable. Setting the button TO HUB (in) indicates that you are connecting a hub; setting the button TO PC (out) indicates that you are connecting a server, PC, or workstation.

Posted: Mon Apr 10 11:31:08 PDT 2000
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