5. The acronyms and abbreviations used in this Schedule have the following meaning—

ABBREVIATION / ACRONYM	MEANING	ADDITIONAL INFORMATION
IMSI	International Mobile Subscriber Identity	This is a unique identification code for each mobile telephony device, integrated in the SIM card and which allows identification of that SIM, via GSM and UMTS networks.
MSISDN	Mobile Subscriber Integrated Services Digital Network Number	This is a number that uniquely identifies a subscription in a GSM or a UMTS mobile network. It is the telephone number to the SIM card in a mobile phone and therefore identifies a mobile subscriber as well as the IMSI.
IMEI	International Mobile Equipment Identity	This is a number, usually unique, to identify GSM, WCDMA and IDEN mobile phones as well as some satellite phones. It is usually found printed inside the battery compartment of the phone.
TMSI	Temporary Mobile Subscriber Identity
SMS	Short Message System
GSM	Global System for Mobile Communications
GPS	Global Positioning System
GPRS	[F1General Packet Radio Service]
UMTS	Universal Mobile Telecommunications System
CDMA	Code Division Multiple Access
PSTN	Public Switch Telephone Networks
DHCP	Dynamic Host Configuration Protocol
SMTP	Simple Mail Transfer Protocol
GTP	GPRS Tunnelling Protocol
WEP	Wired Equivalent Privacy
WPA	Wi-Fi Protected Access
VoIP	Voice over Internet Protocol
[F2WCDMA	Wideband Code Division Multiple Access
IDEN	Integrated Digital Enhanced Network]

SCHEDULES

SCHEDULE 3U.K.Interception and monitoring goods and interception and monitoring technology