RTC
RX
SIM
SBAS
SMS
TE
TX
UART
URC
USSD
WAAS
Phonebook abbreviations
FD
LD
MC
ON
RC
SM
NC
C. Safety Caution
Table 55: Safety caution
Marks
Requirements
When in a hospital or other health care facility, observe the restrictions about the use of mobiles.
Switch the cellular terminal or mobile off, medical equipment may be sensitive to not operate
normally for RF energy interference.
Switch off the cellular terminal or mobile before boarding an aircraft. Make sure it is switched off.
The operation of wireless appliances in an aircraft is forbidden to prevent interference with
communication systems. Forget to think much of these instructions may lead to the flight safety or
offend against local legal action, or both.
Do not operate the cellular terminal or mobile in the presence of flammable gases or fumes. Switch
off the cellular terminal when you are near petrol stations, fuel depots, chemical plants or where
blasting operations are in progress. Operation of any electrical equipment in potentially explosive
atmospheres can constitute a safety hazard.
Your cellular terminal or mobile receives and transmits radio frequency energy while switched on.
RF interference can occur if it is used close to TV sets, radios, computers or other electric
equipment.
Road safety comes first! Do not use a hand-held cellular terminal or mobile when driving a
vehicle, unless it is securely mounted in a holder for hands free operation. Before making a call
with a hand-held terminal or mobile, park the vehicle.
SIM808_Hardware Design_V1.00
Real Time Clock
Receive Direction
Subscriber Identification Module
Satellite Based Augmentation Systems
Short Message Service
Terminal Equipment, also referred to as DTE
Transmit Direction
Universal Asynchronous Receiver & Transmitter
Unsolicited Result Code
Unstructured Supplementary Service Data
Wide Area Augmentation System
SIM fix dialing phonebook
SIM last dialing phonebook (list of numbers most recently dialed)
Mobile Equipment list of unanswered MT calls (missed calls)
SIM (or ME) own numbers (MSISDNs) list
Mobile Equipment list of received calls
SIM phonebook
Not connect
65
Smart Machine Smart Decision
2014.03.27
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