Reference library
IoT Connectivity Glossary
Plain-English definitions for cellular IoT, SIM technology, networking, radio performance and security.
APNThe network gateway and policy context used when a cellular device establishes a data session.
CGNATCarrier-grade NAT, where many subscribers share public IPv4 addresses.
eSIMA general term for remotely provisionable SIM technology.
eUICCThe secure hardware and software platform capable of storing multiple operator profiles.
ICCIDThe serial number that identifies a SIM card or profile.
IMEIThe identifier assigned to a cellular modem or device.
IMSIThe subscriber identity used by a mobile network to authenticate service.
LTE-MA 4G technology optimised for lower-power IoT devices.
MIMOUse of multiple antennas and radio paths to improve performance and reliability.
NB-IoTA low-power wide-area cellular technology for small amounts of data.
PLMNA public land mobile network identified by a mobile country code and network code.
Private APNA controlled mobile data gateway that isolates or privately routes device traffic.
RedCap5G Reduced Capability, positioned between high-performance 5G and low-power IoT technologies.
RSRPA measure of LTE or 5G reference-signal power.
RSRQA signal-quality measure influenced by interference and cell loading.
SGP.22The GSMA consumer eSIM architecture commonly used in phones and some devices.
SGP.32The GSMA IoT eSIM architecture designed for scalable remote provisioning.
SINRThe ratio of useful signal to interference and noise.
SteeringPolicies used to influence which roaming network a SIM or device selects.
WireGuardA modern VPN protocol commonly used for secure remote connectivity.