User's Manual
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EHS8 Hardware Interface Overview Page 39 of 43
6.3 Terms and Abbreviations
39
EHS8_HIO_v02.770 2014-08-11
Confidential / Preliminary
RoHS Restriction of the use of certain hazardous substances in electrical and electronic
equipment.
ROM Read-only Memory
RTC Real Time Clock
RTS Request to Send
Rx Receive Direction
SAR Specific Absorption Rate
SAW Surface Accoustic Wave
SELV Safety Extra Low Voltage
SIM Subscriber Identification Module
SMD Surface Mount Device
Abbreviation Description
SMS Short Message Service
SMT Surface Mount Technology
SPI Serial Peripheral Interface
SRAM Static Random Access Memory
TA Terminal adapter (e.g. GSM module)
TDMA Time Division Multiple Access
TE Terminal Equipment, also referred to as DTE
TLS Transport Layer Security
Tx Transmit Direction
UART Universal asynchronous receiver-transmitter
URC Unsolicited Result Code
USSD Unstructured Supplementary Service Data
VSWR Voltage Standing Wave Ratio