详询郭或
Working bands
TD-SCDMA2100/1900 MHz GSM900/1800 MHz （Data only or
ematics）
For detailed information about the working bands supported, seeOverview.
Working
temperature
Normal working temperature: –20°C to +70°C
Extreme working temperatures: –30°C to –20°C and +70°C to+75°C
Ambient
temperature for
storage
–40°C to 85°C
Power voltage
3.3–5.5 V （3.8 V is recommended.）
AT commands
See the HUAWEI MT509 LGA Module AT Command Interface
Specification.
Applicationinterface （116-
pin LGA
UART （supporting 8-wire UART）
One standard Subscriber Identity Module （SIM） card interface （3 Vor 1.8 V）
Audio（OPTION） :
（only ematics version supports this function）
For detailed information about the working bands supported, seeOverview.
2×Micphone in/1×Handset out/1×Speaker out/1×PCM
SMS
Management of text messages: read messages, delete messages,
storage status, and mess
