User's Manual

Elpro Technologies 450U-E Wireless Ethernet Modem & Device Server User Manual
78 www.cooperbussmann.com/wirelessresources Rev Version 1.0.12-Beta7
connection-oriented services between two nodes on the network. SPX is used primarily by
client/server applications.
ISDN
A type of broadband Internet connection that provides digital service from the customer's
premises to the dial-up telephone network. ISDN uses standard POTS copper wiring to
deliver voice, data or video.
ISO Network
Model
A network model developed by the International Standards Organization (ISO) that consists
of seven different levels, or layers. By standardizing these layers, and the interfaces in
between, different portions of a given protocol can be modified or changed as technologies
advance or systems requirements are altered. The seven layers are: Physical , Data Link,
Network, Transport, Session, Presentation, Application.
LAN
Local Area Network. A system of connecting PCs and other devices within the same physical
proximity for sharing resources such as an Internet connections, printers, files and drives.
Receive
Sensitivity
The minimum signal strength required to pick up a signal. Higher bandwidth connections
usually have less receive sensitivity than lower bandwidth connections.
Router
A device that forwards data from one WLAN or wired local area network to another.
SNR
Signal to Noise Ratio. The number of decibels difference between the signal strength and
background noise.
Transmit
Power
The power usually expressed in mW or dBm that the wireless device transmits at.
MAC Address
Media Access Control address. A unique code assigned to most forms of networking
hardware. The address is permanently assigned to the hardware, so limiting a wireless
network's access to hardware -- such as wireless cards -- is a security feature employed by
closed wireless networks. But an experienced hacker -- armed with the proper tools -- can
still figure out an authorized MAC address, masquerade as a legitimate address and access
a closed network.
Every wireless 802.11 device has its own specific MAC address hard-coded into it. This
unique identifier can be used to provide security for wireless networks. When a network uses
a MAC table, only the 802.11 radios that have had their MAC addresses added to that
network's MAC table will be able to get onto the network.
NAT
Network Address Translation: A network capability that enables a number of computers to
dynamically share a single incoming IP address from a dial-up, cable or xDSL connection.
NAT takes the single incoming IP address and creates new IP address for each client
computer on the network.
NIC
Network Interface Card. A type of PC adapter card that either works without wires (Wi-Fi) or
attaches to a network cable to provide two-way communication between the computer and
network devices such as a hub or switch. Most office wired NICs operate at 10 Mbps
(Ethernet), 100 Mbps (Fast Ethernet) or 10/100 Mbps dual speed. High-speed Gigabit and
10 Gigabit NIC cards are also available. See PC Card.
Proxy Server
Used in larger companies and organizations to improve network operations and security, a
proxy server is able to prevent direct communication between two or more networks. The
proxy server forwards allowable data requests to remote servers and/or responds to data
requests directly from stored remote server data.
RJ-45
Standard connectors used in Ethernet networks. RJ-45 connectors are similar to standard
RJ-11 telephone connectors, but RJ-45 connectors can have up to eight wires, whereas
telephone connectors have four.
Server
A computer that provides its resources to other computers and devices on a network. These
include print servers, Internet servers and data servers. A server can also be combined with a
hub or router.
Site survey
The process whereby a wireless network installer inspects a location prior to installing a
wireless network. Site surveys are used to identify the radio- and client-use properties of a