Elpro Technologies 450U-E Wireless Ethernet Modem & Device Server User Manual
Rev Version 1.0.12-Beta7
www.cooperbussmann.com/wirelessresources
77
website has its own specific IP address on the Internet.
DSL
Digital Subscriber Line Various technology protocols for high-speed data, voice and video
transmission over ordinary twisted-pair copper POTS (Plain Old Telephone Service)
telephone wires.
Encryption
key
An alphanumeric (letters and/or numbers) series that enables data to be encrypted and then
decrypted so it can be safely shared among members of a network. WEP uses an encryption
key that automatically encrypts outgoing wireless data. On the receiving side, the same
encryption key enables the computer to automatically decrypt the information so it can be
read. Encryption keys should be kept secret
Firewall
A device or computer program that keeps unauthorized users out of a private network.
Everything entering or leaving a system's internal network passes through the firewall and
must meet the system's security standards in order to be transmitted. Often used to keep
unauthorized people from using systems connected to the Internet.
Hub
A multiport device used to connect PCs to a network via Ethernet cabling or via 802.11.
Wired hubs can have numerous ports and can transmit data at speeds ranging from 10
Mbps to multi-Gigabyte speeds per second. A hub transmits packets it receives to all the
connected ports. A small wired hub may only connect 4 computers; a large hub can connect
48 or more.
Hz
Hertz. The international unit for measuring frequency, equivalent to the older unit of cycles
per second. One megahertz (MHz) is one million hertz. One gigahertz (GHz) is one billion
hertz. The standard US electrical power frequency is 60 Hz, the AM broadcast radio
frequency band is 535
1605 kHz, the FM broadcast radio frequency band is 88
108 MHz,
and wireless 802.11b/g LANs operate at 2.4 GHz.
IEEE
Institute of Electrical and Electronics Engineers, New York, www.ieee.org. A membership
organization that includes engineers, scientists and students in electronics and allied fields. It
has more than 300,000 members and is involved with setting standards for computers and
communications.
Infrastructure
mode
An 802.11 setting providing connectivity to an AP. As compared to Ad-Hoc mode, whereby
802.11 devices communicate directly with each other, clients set in Infrastructure Mode all
pass data through a central AP. The AP not only mediates wireless network traffic in the
immediate neighbourhood, but also provides communication with the wired network. See
Ad-Hoc and AP.
I/O
Input / Output. The term used to describe any operation, program or device that transfers
data to or from a computer.
Internet
appliance
A computer that is intended primarily for Internet access is simple to set up and usually does
not support installation of third-party software. These computers generally offer customized
web browsing, touch-screen navigation, e-mail services, entertainment and personal
information management applications.
IP
Internet Protocol. A set of rules used to send and receive messages across local networks
and the Internet.
IP telephony
Technology that supports voice, data and video transmission via IP-based LANs, WANs, and
the Internet. This includes VoIP (Voice over IP).
IP address
A 32-bit number that identifies each sender or receiver of information that is sent across the
Internet. An IP address has two parts: an identifier of a particular network on the Internet and
an identifier of the particular device (which can be a server or a workstation) within that
network.
IPX-SPX
Internetwork Packet Exchange, a networking protocol used by the Novell NetWare operating
systems. Like UDP/IP, IPX is a datagram protocol used for connectionless communications.
Higher-level protocols, such as SPX and NCP, are used for additional error recovery services.
Sequenced Packet Exchange, SPX, a transport layer protocol (layer 4 of the OSI Model) used
in Novell Netware networks. The SPX layer sits on top of the IPX layer (layer 3) and provides