Glossary of Terminology

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APN (Access Point Name) - An APN is the name given to a gateway between a GPRS, 3G or 4G mobile network. When establishing an internet connection an APN name and sometimes a username and password are require to connect.

3G (Third Generation) - 3G refers to a form of third generation wireless technology that supports  high-speed data transmission rates.

4G/LTE (Fourth Generation or Long Term Evolution) - 4G connectivity is an improvement upon 3G and provides very high-speed data transmission rates.

GSM (Global System for Mobile Communications Service) - GSM utilises the division of time and frequency techniques to increase the call capacity of a wireless network. Other services such as SMS, CSD and GPRS are also enabled through GSM. In Europe, Asia and Australia the 900MHz and 1800MHz frequencies are used, where as America uses a frequency of 1900MHz.

GPRS (Global Packet Radio Service) - GPRS utilises GSM networks to provide wireless internet connectivity for phones, computers and other devices. Data rates vary between 56 and 114 Kbps. GPRS provides the basic level of internet connectivity before 2G, 3G and 4G.

HLR (Home Location Register) - A HLR is the main database within a celluar network that holds subscriber details including SIM profile, device, current location,identification encryption code and the users 'home' cell.

ICCID (Integrated Circuit Card ID) - Each SIM card is internationally identified by a unique serial number that is imbedded within the SIM profile and is engraved or printed on the SIM card.

IMSI (International Mobile Subscriber Identity) - An IMSI is a unique 15 digit number used to globally identify a subscriber. The IMSI is stored within the SIM profile and provided to the network when connected. The IMSI can also be use to acquire details of the mobile number in the HLR.

IMEI (International Mobile Equipment Identity) - An IMEI number is a unique identifier that is associated with a given device. The identifier often called a serial number is assigned to the device by the manufacturer and can be used to track individual devices.

MSISDN (Mobile Station International Subscriber Directory Number) - The MSISDN is most commonly referred to as the mobile number. The number includes a country code and the remaining structure is defined by the mobile network. The MSISDN is used to track subscriber calls

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