SIM900D Hardware Design
Abbreviation
Description
Imax
Maximum Load Current
Phonebook abbreviations
FD
SIM fix dialing phonebook
LD
SIM last dialing phonebook (list of numbers most recently dialed)
MC
Mobile Equipment list of unanswered MT calls (missed calls)
ON
SIM (or ME) own numbers (MSISDNs) list
RC
Mobile Equipment list of received calls
SM
SIM phonebook
NC
Not connect
1.3 Safety Precautions
The following safety precautions must be observed during all phases of the operation. Usage, service or repair of
any cellular terminal or mobile incorporating SIM900D modules, manufactures of the cellular terminal should
send words of the following safety information to users and operating personnels and to incorporate these
guidelines into all manuals supplied with the product. If not so, SIMCom does not take any liability for customer
failure to comply with these precautions.
Observe the restrictions of the usage of mobiles in a hospital or other health care facility. Switch
the cellular terminal or mobile off, since medical equipment may be sensitive not to 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 of these instructions may lead to the flight safety or
offending 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 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.
Cellular terminal or mobile handset receives and transmits radio frequency energy while they are
switched on. RF interference can occur if it is used near TV sets, radios, computers or other
electric equipment.
SIM900D_Hardware Design_V1.04
2010.10.09
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