User's Manual

MeiG hardware design guide
45
CSD
Circuit Switched Data
CTS
Clear to Send
DTE
Data Terminal Equipment (typically computer, terminal, printer)
DTR
Data Terminal Ready
DTX
Discontinuous Transmission
EFR
Enhanced Full Rate
ESD
Electrostatic Discharge
ETS
European Telecommunication Standard
FR
Full Rate
HR
Half Rate
IMEI
International Mobile Equipment Identity
Li-ion
Lithium-Ion
MO
Mobile Originated
MS
Mobile Station (GSM engine), also referred to as TE
MT
Mobile Terminated
PAP
Password Authentication Protocol
PBCCH
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
PPP
Point-to-point protocol
RF
Radio Frequency
RMS
Root Mean Square (value)
RX
Receive Direction
SIM
Subscriber Identification Module
SMS
Short Message Service
TDD
Time Division Distortion
TE
Terminal Equipment, also referred to as DTE
TX
Transmit Direction
UART
Universal Asynchronous Receiver & Transmitter
URC
Unsolicited Result Code
USSD
Unstructured Supplementary Service Data