Novatel Minstrel m500, Руководство пользователя

Страница: 66 / 72

60 Glossary — Equipment Identifier (EID)
Revision 1.02 90023164
Equipment Identifier (EID)
Every wireless IP modem manufactured has a unique serial number associated with it, which
is referred to as the Equipment Identifier or EID. Each EID consists of six sets of two
hexadecimal numbers that are often separated by a period (“.”), as in the sample EID
00.60.D6.04.BC.FE.
Internet Protocol (IP)
Internet Protocol works in conjunction with Transmission Control Protocol (TCP). TCP/IP are
part of a group of protocols that provide communication across interconnected networks.
TCP/IP is the protocol used on the Internet. The TCP protocol first establishes a connection
between the two systems in order to send and receive data, and then breaks and sequentially
marks the message into small packets. The IP protocol routes and sends the packets based
on the IP address.
IP Addresses
As with personal computers that access the Internet, modems using CDPD technology also
have a dedicated Internet Protocol (IP) address, which is used to identify the node or access
point for the modem on the Internet. The service provider assigns this IP address.
The 32-bit host address is usually represented in dotted decimal notation, e.g. 128.121.4.5.
The address can be split into a network number (or network address) and a host number
unique to each host on the network and sometimes also a subnet address.
IP Network
A network of computer networks that employ Internet Protocol allowing a user to access the
Internet, provided that the user has a modem; telephone line, cable line, or wireless data
network (e.g. CDPD); and a service provider.
Light Emitting Diode (LED)
A light emitting diode (LED) emits light when a current is passed through it. The LEDs
associated with the Minstrel m500 modem indicate the status of the network connection, data/
messages, and the battery.
Local Area Network (LAN)
A computer network that spans a relatively small area (typically up to a 1 km radius), although
most LANS are confined to a single building or group of buildings. This type of networking
allows for easy interconnection of terminals, printers, and computers within a building or
buildings.
Offline
A modem is considered offline when it’s connection to a telephone line, cable line, or wireless
data network is suspended.
Online
A modem is considered online when it is actively connected to a telephone line, cable line,
or wireless data network.
Packet
A short block of data transmitted across a network.
Packet Size
The size of a packet expressed in bytes.