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www.cooperbussmann.com/wirelessresources
Cooper Bussmann 615M-1 Cellular Data Modem and IP Router Series Manual
Rev Version 1.0
Term
Definition
IP
Internet protocol. A set of rules used to send and receive messages across local networks
and the Internet.
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 net-
work.
IPsec
Internet Protocol Security (IPsec) is a protocol suite for securing Internet Protocol (IP) com-
munications by authenticating and encrypting each IP packet of a communication session.
IPsec also includes protocols for establishing mutual authentication between agents at the
beginning of the session and negotiation of cryptographic keys to be used during the session.
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.
LED
A light-emitting diode (LED) is a semiconductor light source. LEDs are used as indicator
lamps in many devices.
Receive Sensitivity
The minimum signal strength required to pick up a signal. Higher bandwidth connections usu-
ally have less receive sensitivity than lower bandwidth connections.
Router
A device that forwards data from one WLAN or wired local area network to another.
Transmit Power
The power (usually expressed in mW or dBm) at which the wireless device transmits.
MAC Address
Media Access Control address. A unique code assigned to most forms of networking hard-
ware. The address is permanently assigned to the hardware. Limiting a wireless network’s
access to hardware, such as wireless cards, is a security feature employed by closed wire-
less networks. However, 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 802.11 radios that have had their MAC addresses added to that network’s
MAC table will be able to get onto the network.
MDIX
A Medium Dependent Interface (MDI) describes the interface (both physical and electrical)
in a computer network from a physical layer implementation to the physical medium used to
carry the transmission. Ethernet over twisted pair also defines a medium dependent interface
crossover (MDIX) interface. Auto-MDIX ports on newer network interfaces detect if the con-
nection would require a crossover, and automatically chooses the MDI or MDIX configuration
to properly match the other end of the link.
MEID
A mobile equipment identifier (MEID) is a globally unique number identifying a physical piece
of CDMA mobile station equipment. An MEID is 56 bits long (14 hex digits). It consists of
three fields, including an 8-bit regional code (RR), a 24-bit manufacturer code, and a 24-bit
manufacturer-assigned serial number. The check digit (CD) is not considered part of the
MEID.
MS
A mobile station (MS)[ comprises all user equipment and software needed for communication
with a mobile 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 com-
puter on the network.
NID
A Network Interface Device (NID) is a device that serves as the demarcation point between
the carrier’s local loop and the customer’s premises wiring.
NIMEA
National Marine Electronics Association (NMEA) is a combined electrical and data specifica-
tion for communication between marine electronic devices such as echo sounder, sonars,
anemometer, gyrocompass, autopilot, GPS receivers and many other types of instruments.
It has been defined by, and is controlled by, the U.S.-based National Marine Electronics
Association.
NTP
Network Time Protocol (NTP) is a networking protocol for clock synchronization between
computer systems over packet-switched, variable-latency data networks.
