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SIM868_Series_Hardware_Design_V1.06 68 2017-07-13
11.2. Terms and Abbreviations
Table 52: Terms and abbreviations
ADC Analog-to-Digital Converter
AMR Adaptive Multi-Rate
CS Coding Scheme
CTS Clear to Send
Data Terminal Equipment (typically computer, terminal, printer)
DTR Data Terminal Ready
Discontinuous Transmission
EFR Enhanced Full Rate
EGSM Enhanced GSM
ESD Electrostatic Discharge
European Telecommunication Standard
GPRS General Packet Radio Service
GSM Global Standard for Mobile Communications
HR Half Rate
MO Mobile Originated
MS Mobile Station (GSM part), also referred to as TE
PAP Password Authentication Protocol
Packet Broadcast Control Channel
PCB Printed Circuit Board
PCL Power Control Level
PCS Personal Communication System, also referred to as GSM 1900
PDU Protocol Data Unit
RF Radio Frequency
RMS Root Mean Square (value)
RX Receive Direction
SIM Subscriber Identification Module
SMS Short Message Service
Terminal Equipment, also referred to as DTE
SINAD Signal to Noise and Distortion Ratio
UART Universal Asynchronous Receiver & Transmitter
URC Unsolicited Result Code
USSD Unstructured Supplementary Service Data
A-GPS Assisted Global Positioning System
Complementary Metal Oxide Semiconductor
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