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Appendix A - Glossary
IMEI (International Mobile Equipment Identity) - A number unique to each GSM/UMTS device that can be used
block network access by a stolen mobile device.
IP (Internet Protocol) - Routes packets over a network.
HSDPA (High Speed Downlink Packet Access) - Advanced WCDMA that delivers bandwidth intensive data at
up to 7.2Mbps; typically associated with 3.5G.
HSUPA (High Speed Uplink Packet Access) - Advanced WCDMA that delivers bandwidth intensive data at up to
5.76Mbps; typically associated with 3.75G.
Kbps (Kilobits per second) - A data flow measure; 1024 bits/second.
LAN (Local Area Network) - A data network with limited range but good bandwidth.
Mbps (Megabits per second) - A data flow measure; 1,048,576 bits/second.
PPP (Point-to-Point Protocol) - An internet connection method.
PIN (Personal Identity Number) - A four to eight digit security code on the SIM which permits access to a user's
mobile carrier network.
PUK (Personal Unblocking Key) - A code used to unlock a blocked PIN number. Usually, if the wrong PUK is entered
ten times in a row, the SIM will become permanently blocked and unrecoverable, requiring a new SIM card.
Rx - Shorthand for Reception.
SIM (Subscriber Identity Module) - A small card that contains key mobile device identification, subscription and
contact information.
SMS (Short Messaging Service) - Allows text messages of up to 160 characters.
Tx - Shorthand for Transmission.
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