403
Also known as the "Forbidden" message. The site is either password-protected or the host does not want your domain to enter.

404
Also known as the "Not Found" message. It is a frequently-seen status code that tells the Web user that the requested page is "Not Found". 404 is part of the Wed's Hypertext Transfer Protocol (HTTP). Usually when this message appears the site you requested no longer exists. It is also possible that you have one mistype character in your requested URL.

AAA
Authentication, Authorization and Accounting. One of three nodes in the cdma2=000 Packet Core Network (PCN.)

ALI
ATM Line Interface. Interface between ATM and 3G systems.

ATM
is one of the transport network technologies being used to connect next generation communications networks, where wireline and wireless are integrated. ANSI American National Standards Institute

AUC/AC
Authentication Center - part of the Home Location Register (HLR) in 3G systems, this performs computations to verify and authenticate the user of mobile phones.

BTS
Base Transceiver Station. The equipment housed in cabinets and co-located with antennas. Cabinets include heating and air-conditioning units, electrical supply, telephony connection and back-up power. (Also known as Radio Base Station.)

BSC
Base Station Controller. A key network node in 3G systems that supervises the functioning and control of multiple Base Transceiver Stations

CAMEL
Customized Application of Mobile Enhance Logic - an ETSI standard for GSM networks that enhances the provision of IN (Intelligent Network) services.

CDMA
Code Division Multiple Access. A technology for digital transmission of radio signals between, for example, a mobile telephone and a radio base station. In CDMA, a frequency is divided using codes, rather than in time or through frequency separation. Implemented in 800 and 1900 MHz systems around the world.

CMDA2000
cdma2000 is a radio transmission technology and backbone technology for the evolution of cdmaOne/IS-95 to 3G. CDR Call Data Recording - a feature in a telephone system that allows it to collect and record information on incoming and outgoing calls.

CORBA
Common Object Request Broker Architecture - provides standard object-oriented interfaces between ORBs (Object Request Broker), as well as to external applications and application platforms.

EDGE
Enhanced Data rates for Global Evolution. EDGE is a technology that gives GSM and TDMA similar capacity to handle services for 3G. EDGE was developed to enable the transmission of large amounts of data at rates of 384kbit/s.

EIR
Equipment Identity Register. A database used to verify the validity of equipment being used in mobile networks. It can provide security features such as blocking of calls from stolen mobile phones and preventing unauthorized access to the network. Black-listed equipment prevents call completion.

EPOC
This is an operating system for mobile multimedia terminals developed by Symbian (a joint-venture between Ericsson, Matsushita, Nokia, Motorola and Psion).

ETSI
European Telecommunications Standards Institute -ETSI's purpose is to define standards that will enable the global market for telecommunications to function as a single market.

GGSN
Gateway GPRS Support Node. One of the two main GPRS nodes, which provides the interface between the radio network and the IP network.

GSM
Global System for Mobile communication - the largest digital mobile standard in use today. Implemented in 400MHz, 900MHz, 1800MHz and 1900MHz frequency bands.

GPRS
General Packet Radio Service - an enhancement for GSM and TDMA core networks that introduces packet data transmission. GPRS uses radio spectrum very efficiently and provides users with "always on" connectivity and greater bandwidth.

GTP
GPRS Tunneling Protocol - creates a secure connection in the IP environment, by encapsulating encrypted data in an IP packet.

HA
Home Agent. One of three nodes in a cdma2000 Packet Core Network (PCN.)

HLR
Home Location Register. A permanent database used in mobile systems to identify subscribers and to contain subscriber data related to features and services.

IETF
Internet Engineering Task Force - one of two technical working bodies of the Internet Activities Board, tasked with developing new TCP/IP standards for the Internet.

IMT-2000
International Mobile Telecommunications 2000. The ITU initiative for standardizing radio access to the global telecommunications infrastructure, through both satellite and terrestrial systems, serving fixed and mobile users in public and private networks - in other words, 3G.

IOS
Interoperability Standard. The standard used to define open interfaces in cdmaOne and cdma2000 networks

IP
Internet Protocol - data protocol used in the Internet.

IS-136
The standard behind TDMA networks

Ipv4
Internet Protocol version four - the version of IP most commonly deployed today.

Ipv6
Internet Protocol version six - which will, among other things, add significantly to the address capacity, security and real-time capability of IP.

IPSec
One of the most widely used IP tunneling security protocols.

IS-2000
Standard for cdma2000

IS-95
Specification used for air interface of cdmaOne networks

ISDN
- Integrated Services Digital Network. A digital public telecommunications network in which multiple services (voice, data, images and video) can be provided via standard terminal interfaces.

ITU
International Telecommunications Union - the part of the United Nations responsible for co-ordinating global telecommunications activities, especially in the area of standards.

Iu
UMTS interface between the core network and the RAN (radio access network).

IWF
Interworking Function for CDMA data using Simple IP.

LA
Location Area.

MAP
Mobile Application Part. Part of the SS7 protocol used in GSM. MAP standards address registration of roamers and intersystem hand-off procedures.

MGw
Media Gateway - a network node that enables a variety of circuit-switched services to interoperate with packet-based IP networks.

MPLS
Multi Protocol Label Switching. An evolving standard for speeding up IP-based data communications over ATM networks.

MSC
Mobile Switching Center - a switch providing services and co-ordination between mobile users in a moblie network and external networks.

O&M
Operations & Maintenance. Support for the day to day running of a network.

OSA
Open System Architecture - enables seamless transfer of information between different systems.

OSS
Operations Support System. Methods & procedures that directly support the daily operation of a telecoms network.

PBN
Packet backbone network - the physical network carrying packet data (IP) traffic.

PCN
Packet Core Network. Packet data network for cdma2000.

PCS
Personal Communications Services - the collective term for US mobile telephone services in the 1900MHz frequency band.

PDC
Personal Digital Cellular - a Japanese standard for digital mobile telephony in the 800MHz and 1500MHz bands.

PDP
Packet Data Protocol - network protocol for handling transfer of packet data.

PDSN
Packet Data Serving Node. One of three nodes in a cdma2000 PCN.

PLMN
Public Land Mobile Network. A mobile network established to provide services.

QoS
Quality of Service. A generic term that in IP networking refers to different levels of prioritization of data packets over a network.

RADIUS
Remote Authentication Dial In User Service - used in mobile networks to authenticate authorized users.

RAN
Radio Access Network. The portion of a mobile network that handles subscriber access, including radio base stations and concentration nodes.

RNC
Radio Network Controller - manages the radio part of the network in UMTS.

RTT
Radio Transmission Technology

SMS
Short Message Service -- mobile-to-mobile text messaging in GSM

SMS-C
Short Message Service Center. Handles management of incoming and outgoing SMS.

SGSN
Serving GPRS Support Node. The SGSN handles the data traffic of users in a geographical service area and is one of the two types of node implemented in a GPRS environment.

TCP/IP
Transmission Control Protocol/Internet Protocol. Usually abbreviated to IP, the 'language' used by the Internet.

TDMA
Time Division Multiple Access - a digital radio technique that divides radio spectrum between users using "timeslots", rather than (only) frequency separation or codes, used in GSM and TDMA (IS-136) mobile networks. TDMA is also the term used to describe the digital enhancement of the AMPS analog standard, formerly known as D-AMPS (Digital Advanced Multiple Access).

TIA
Telecommunications Industry Association - a US telecoms standards body.

TMForum
The Telecommunications Management Forum - an industry body working to encourage and develop global standards for telecoms management systems.

UMTS
Universal Mobile Telecommunications System - a 3G standard, being developed under the auspices of ETSI, and intended mainly for the evolution of GSM networks.

UTRAN
UMTS Terrestrial Radio Access Network - the name of the WCDMA radio network in UMTS.

USC
User Service Center.

VHE
Virtual Home Environment. Home Environment (HE) is a term used to describe the service provider (operator or ISP). Virtual Home Environment is a concept for personalized service portability across network boundaries and between terminals. Users are consistently presented with the same personalized features, user interface and services in any network and on any terminal (within the capabilities of the terminal), wherever the user may be located.

VPN
Virtual Private Network - a "private" communications network that uses public network resources, for example to interconnect PBXs and LANs.

VOICEXML
The VoiceXML system is a relatively straightforward technology: The user places a normal voice call to a VoiceXML server and the gateway translates the request (from a spoken command) and retrieves the relevant VoiceXML page from any web server on the internet via HTTP and performs actions based on the commands specified in the page.

VoIP
Voice over Internet Protocol. A technology for transmitting voice calls over IP-based networks. Also called IP telephony.

WAP
Wireless Application Protocol - a protocol that enables Internet services to be delivered to small-screen mobile devices. WAP is the first step towards true Mobile Internet, and was initiated by Ericsson.

WCDMA
Wideband Code Division Multiple Access - the radio interface technology that will be used in most 3G systems around the world. WCDMA is optimized to support multiple high-speed mobile multimedia services such as full-motion video, Internet access and videoconferencing.

WIN
Wireless Intelligent Networking. A TIA standard for ANSI-41 networks that enhances the provision of IN (Intelligent Network) services.

END......................(Found an acronym we havn't- please mail us with this link)