SIM908C模块是一个完整的四频GSM / GPRS模块，结合GPS卫星导航技术一般功能：

• 四频850/900/1800 / 1900MHz GPRS多时隙类10 GPRS移动站B类符合GSM阶段2/2 +类4（850 / 900MHz时为2W） - 类1（1800 / 1900MHz时为1W）控制通过AT命令（GSM 07.07，07.05和SIMCom增强AT命令）SIM应用工具包电源电压范围：GPRS：3.2 - 4.8V，GPS：3.0 - 4.5V低功耗尺寸：30 * 30 * 3.2mm重量：
  • sim908：5.2g sim908-c：11.1g
  工作温度：-40°C至+ 85°C

通过GSM / GPRS的短信规格：

• 点对点MO和MT SMS小区广播文本和PDU模式

音频规格：

• 三尖瓣半速率（HR）：
  • 全速率（FR）增强型全速率（EFR）
  免提操作回音取消

数据传输规范：

• GPRS类8/10：最大85.6kbps（下行链路）PBCCH支持编码方案CS 1，2，3，4 CSD高达14.4 kbps USSD非透明模式PPP堆栈集成TCP / IP堆栈

兼容性：AT蜂窝命令接口GPS规范：

• 接收器类型：
  • 42通道GPS L1 C / A码，高性能STE发动机
  灵敏度：
  • 跟踪：-160dBm冷启动：-143dBm冷启动时间：30s（典型值）热启动：1s（典型值）
  精度：水平位置： <2.5m CEP Power consumption (GSM engine in idle mode):
  • 采集77mA跟踪76mA

接口：

• 80-pad带SMT类型接口到外部SIM 3V / 1.8V双模拟音频接口SPI接口RTC备用充电接口用于GSM / GPRS的串行接口和调试接口用于GPS的调试接口NMEA信息输出用于GSM / GPRS的两个单独的天线连接器/全球定位系统

证书：

• ce rohs

SIM908C module is a complete Quad-band GSM/GPRS module which combines GPS technology for satellite navigation General features:

• Quad-Band 850/900/1800/1900MHz GPRS multi-slot class 10 GPRS mobile station class B Compliant to GSM phase 2/2+-Class 4 (2W at 850/900MHz)-Class 1 (1W at 1800/1900MHz) Control via AT commands (GSM 07.07 ,07.05 and SIMCom enhanced AT Commands) SIM application toolkit Supply voltage range: GPRS: 3.2 - 4.8V, GPS: 3.0 - 4.5V Low power consumption Dimensions: 30*30*3.2mm Weight:
  • SIM908: 5.2g SIM908-C: 11.1g
  Operation temperature: -40°C to +85°C

Specifications for SMS via GSM/GPRS:

• Point-to-point MO and MT SMS cell broadcast Text and PDU mode

Specifications for audio:

• Tricodec-half rate (HR):
  • Full rate (FR) Enhanced Full rate (EFR)
  Hands-free operation Echo cancellation

Specifications for data transfer:

• GPRS class 8/10: maximum 85.6kbps (downlink) PBCCH support Coding schemes CS 1, 2, 3, 4 CSD up to 14.4 kbps USSD Non transparent mode PPP-stack Integrated TCP/IP stack

Compatibility: AT cellular command interface Specification for GPS:

• Receiver type:
  • 42-channel GPS L1 C/A code, High-performance STE engine
  Sensitivity:
  • Tracking: -160dBm Cold starts: -143dBm Time-to-first-fix Cold starts: 30s (typ.) Hot starts: 1s (typ.)
  Accuracy: horizontal position: <2.5m CEP Power consumption (GSM engine in idle mode):
  • Acquisition 77mA Tracking 76mA

Interfaces:

• 80-pad with SMT type Interface to external SIM 3V/ 1.8V Dual analog audio interfaces SPI interface RTC backup Charge interface A serial interface and a debug interface for GSM/GPRS Debug interface for GPS NMEA information output Two separate antenna connectors for GSM/GPRS/GPS

Certificates:

• CE RoHS