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Glossary
● 4G LTE — Fourth Generation Long Term Evolution. LTE is a standard for wireless data communications
technology and an evolution of the GSM/UMTS standards. The goal of LTE is to increase the capacity
and speed of wireless data networks using new DSP (digital signal processing) techniques and
modulations that were developed around the turn of the millenium. A further goal is the redesign and
simplification of the network architecture to an IP-based system with significantly reduced transfer
latency compared to the 3G architecture. The LTE wireless interface is incompatible with 2G and 3G
networks, so that it must be operated on a separate wireless spectrum.
● IMEI — International Mobile Equipment Identity. Used in LTE networks to identify the device. It is
usually printed on the device and can often be retrieved using a USSD code.
● Network Operator — The vendor who provides your wireless access. Known by different names in
different regions, some examples are: wireless provider, network provider, and service provider.
● Network Technology — The technology on which a particular network provider’s system is built.
● Port — A virtual data connection used by programs to exchange data. It is the endpoint in a logical
connection. The port is specified by the port number.
● Port Number — A 16-bit number used by the TCP and UDP protocols to direct traffic on a TCP/IP
host. Certain port numbers are standard for common applications.
● Protocol — A standard that enables connection, communication, and data transfer between
computing endpoints.
● SIM — Subscriber Identification Module. Found in LTE and GSM network technology, the SIM is a card
containing identification information for the subscriber and their account. The SIM card can be moved
to different devices.
● TTY — Text Telephones (TTY), also known as Telecommunications Device for the Deaf (TDD), are used
by the deaf, hard–of–hearing, and individuals with speech impairments to communicate.
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