S920 Reference Guide
v1.0 | 2
1.3 Acronyms and Terms
Acronym Definition
DHCP Dynamic Host Configuration Protocol -- A network management protocol
used on IP networks. The DHCP server dynamically assigns an IP address and
other network configuration parameters to each device on the network.
ECR Electronic Cash Register
LKI Local Key Injection
Micro SD Removable flash memory card used to store information
NFC Near Field Communication — A form of contactless communication between
devices.
OS Operating System
POI Point-of-Interaction
POS Point of Sale or Point of Service
PSAM Purchase Security Application Module — Small security module which is
placed in payment terminals and looks like a SIM card for a cell phone.
SIM Card Subscriber Identity Module Card — A smart card that stores data GSM cellu-
lar network subscribers.
TF TransFlash — MicroSD memory cards were originally named TransFlash, T-
Flash, or TF cards. TF and MicroSD cards are functionally identical so both
types of cards can operate in devices made for the other.
WAN Wide Area Network — Cellular phone data networks run on a WAN. It covers
a broad area and many devices in that area.
Wi-Fi A trademarked term used to describe the wireless networking technology
that allows computers and other devices to communicate over a wireless
signal. Based on IEEE802.11 standards.
WLAN Wireless Local Area Network — Any wireless local area network, no matter
what technology is used. Wi-Fi is one type of WLAN.
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