Path over which data flows. Specifically in CSD and HSCSD, the type of telephony
link from the GSM network to the server - V PSTN or ISDN.
bps
Bits per second - rate of data flow.
COM Port
Defines a serial/RS-232 port within the Windows environment.
May be physical (COM1 port on the rear of the PC) or virtual (COM5 port communicating
with a PC card modem)
CS
Circuit Switched. Connection from A to B which has a fixed bandwidth and is
maintained over a period of time, for example a voice telephone call.
CS-1 to CS-4
Coding Scheme. Determines the data rate per timeslot in GPRS.
e-GSM
Extended GSM. New frequencies specified by the European Radio Communications
Committee (ERC) for GSM use when additional spectrum is needed (Network-dependent).
It allows operators to transmit and receive just outside GSM's core 900 frequency
band. This extension gives increased network capability.
ETSI
European Telecommunications Standards Institute. www.etsi.org
GGSN
Gateway GPRS Support Node
GPRS
General Packet Radio Services.
GSM
Global System for Mobile Communications. GSM is the world's most widely-used
digital mobile phone system, now operating in over 160 countries around the
world.
GSM 900
The GSM system family includes GSM 900, GSM 1800 and GSM 1900. There are different
phases of roll-out for the GSM system and GSM phones are either phase 1 or phase
2 compliant.
GSM 1800
Also known as DCS 1800 or PCN, this is a GSM digital network working on a
frequency of 1800 MHz. It is used in Europe and Asia-Pacific.
GSM 1900
Also known as PCS. Refers to a GSM system running in the 1900MHz band. Used
in the USA and Canada, for instance.
HTML
HyperText Markup Language.
HTTP
Hypertext Transfer Protocol.
ISDN
Integrated Services Digital Network. Can provide circuit-switched data connections
in multiples of
64 kbps.
ISP
Internet Service Provider.
kbps
Kilobits per second - rate of data flow.
LAN
Local Area Network.
ME
Mobile Equipment.
MO
Mobile Origination. For example, an SMS message sent from a mobile terminal.
MMI
Man-Machine Interface.
MS
Mobile Station.
MT
Mobile Termination.
PC
Personal Computer.
PCs
Personal Communications Services, often used to describe GSM1900 networks.
PC Card
A card having physical and electrical characteristics specified by PCMCIA
providing extra functionality when inserted into a portable PC. Typical examples
are modems and network cards. Type refers to the thickness of the card. The
Dell TrueMobile 5100 Tri-band GPRS PC Card is type II.
PCMCIA
Personal Computer Memory Card International Association - defines specifications
for PC Cards. www.pcmcia.org
PDP
Packet Data Protocol.
phonebook
A memory in the SIM card where phone numbers can be stored and accessed by
name or position.
PSTN
Public Switched Telephone Network, for example ordinary analogue phone line
for speech and/or computer modem.
RADIUS
Remote Access Dial-In Service. Facility at the ISP or corporation to manage
remote data connections.
RX
Receive
SC
Service Centre (for SMS).
Service Provider
A company that provides services and subscriptions to Dell TrueMobile 5100 Tri-band GPRS PC Card users.
SIM card
Subscriber Identity Module card - a card that must be inserted in any GSM-based
mobile terminal. It contains subscriber details, security information and memory
for a personal directory of numbers. The card can be a small plug-in type or
credit card-sized, but both types have the same functions. The Dell TrueMobile 5100 Tri-band GPRS PC Card uses the
small plug-in card.
SMS
Short Message Service. Allows messages of up to 160 characters to be sent
and received via the network operator's message centre to a Dell TrueMobile 5100 Tri-band GPRS PC Card.
TCP/IP
Transmission Control Protocol/Internet Protocol.
TCP/IPv4
TCP/IP Version 4. Most widely implemented form of TCP/IP today having a 4
byte address format such as 212.161.127.136.
TE
Terminal Equipment. Generic term for GSM terminals such as phones and PC cards.
Terminal Adaptor
Generic term for the equipment terminating a digital comms line such as an
ISDN2 line. The Dell TrueMobile 5100 Tri-band GPRS PC Card is a Terminal Adaptor since it interfaces to GSM digital
data services.
TLS
Transport Layer Security. Used by Web browsers, for example.
TX
Transmit
Type II
Refers to thickness of a PC Card as defined in the specification from PCMCIA.
URL
Uniform Resource Locator.
USSD
Unstructured Supplementary Services Data. Narrow-band GSM data service. For
example entering *79*1234# might return the stock price for stock 1234.
V.110
ETSI standard for data over an ISDN circuit.
V.120
ETSI standard for data over an ISDN circuit.
VPN
Virtual Private Network.
WAP
Wireless Application Protocol. A global standard specified in order to make
Internet services available for mobile users.
