General features
• Quad-Band: 850/900/1800/1900MHz                                              
• GPRS multi-slot class 10/8
• GPRS station class B
• Compliant to GSM phase 2/2+
  -Class 4 ( 2W @ 850/900MHz)
  -Class 1 ( 1W @ 1800/1900MHz)
• SAIC(Single Antenna Interference Cancellation) support      
• Control Via AT Commands(GSM 07.07 , 07.05
  and SIMCOM enhanced AT Commands)
• SIM application toolkit
• Supply voltage range: 3.2V~4.8V
• Low power consumption: 1mA(sleep mode&BS-PA-MFRMS=9)
• Operation temperature: -40℃~ +85℃
• Dimension: 40*33*3mm
• Weight: 7g


SIM900B无线通讯模块

Specifications for
• Group 3 , class 1


Specifications for GPRS Data
• GPRS class 10: max. 85.6Kbps(downlink)
• PBCCH support
• Coding schemes CS 1, 2, 3, 4
• PPP-stack


Specifications for CSD Data
• USSD
• Non transparent mode


Specifications for SMS via GSM/GPRS
• Point to point MO and MT
• SMS cell broadcast
• Text and PDU mode


Software features
• 0710 MUX protocol
• Embedded TCP/UDP protocol
• FTP/HTTP


Enhanced version features
• Embedded AT
• FOTA
• MMS

Specifications for Voice
• Tricodec
  -Half rate(HR)
  -Full rate(FR)
  -Enhanced Full rate(EFR)
• AMR
  -Half rate(HR)
  -Full rate(FR)
• Hands-free operation(Echo suppression)


Interfaces
• 60 PIN Board-to-board connector
• Interface to external SIM 3V/1.8V       
• Two analog audio interface
• RTC backup
• SPI interface
• Serial interface
• SIM Card
  -Option 1: SIM Holder
  -Option 2: Embedded SIM
• Keypad            
• GPIO
• PWM
• ADC
• Antenna connector


Compatibility
• AT cellular command interface


Certifications                                                                                
• CE
• GCF
• FCC
• ROHS
• FEACH
• PTCRB
• IC


Carrier Approvals:
• NCC
• Orange
• AT&T
• Vodafone