IoT Glossary
Internet of Things – IoT – Glossary of terms
Bootstrap | A “factory-set” SIM profile applied to an eUICC to allow it to connect out-of-the-box. |
CC-NDC | Country Code-National Destination Code: Identifies the country and the PLMN (see below) or part of it. |
CSR | Customer Service Representative. |
EID | eUICC identification number. |
eUICC | Embedded Universal Circuit Card. A container of multiple SIM profiles for one device. |
Fallback | When an eUICC device loses connectivity it temporarily “falls back” to a pre-selected SIM profile to maintain connectivity. |
HLR | Home Location Register |
HSS | Home Subscriber Service: Responsible for keeping the subscriber profile information and location information. |
GPRS | General Packet Radio Service: 2g/3g mobile data service. |
ICCID | Integrated Circuit Card Identifier. A SIM card contains its unique serial number (ICCID). ICCIDs are also printed on the SIM card during a personalisation process. |
IMEI | International Mobile Equipment Identity. A number used to identify a piece of equipment which uses mobile networks. |
IMSI | International Mobile Subscriber Identity: A number that uniquely identifies every user of a cellular network. |
KPI | Key Performance Indicator. Data used to indicate the performance of equipment or people. |
MCC | Mobile Country Code. |
MNC | Mobile Network Code. |
MNO | Mobile Network Operator. |
MSISDN | Mobile Station International Subscriber Directory Number. The phone number associated with a SIM. |
OTA | Over The Air. Refers to operations done via the mobile network, remotely. |
PLMN | Public Land Mobile Network: A combination of wireless communication services offered by a specific operator in a specific country. Often referred to as a cellular network. |
Roaming Profile | Controls which networks a SIM can connect to when away from the home network. |
SIM | Subscriber Identity Module: Provides a means to securely store the IMSI number and its related key, which are used to identify and authenticate subscribers. |
SIM Profile | One or more profiles assigned to an eUICC each with similar functions to a traditional SIM. |
SKU | Stock Keeping Unit – Used to categorise and “bundle” SIMs, Profiles and eUICC for advanced and simpler ordering and stock control. |
SMS | Short Message Service. Also known as a text message. |
Steering | Steering of roaming, or “preferred roaming”, is the process by which a mobile operator decides which partner their subscribers will use whilst roaming. |
Subscriber | The subscriber is the person or organisation which pays for the roaming service, and so a subscriber may have many SIMs. |
TADIG | Transferred Account Data Interchange Group: A unique number identifying network operators in a mobile network. Made up of a 3-character country code a 2-character operator/company identifier. |
UL | Update Location: For 2g/3g networks. |
UL GPRS | Update Location GPRS: For 2g/3g networks. |
UL R | Update Location: For 4g networks. |
Visiting Operator | The operator of the network which the roaming SIM. |