Double Channels MC8331A CDMA Wireless module GSM Alarm client  TCP MO / MTModule 

General Features:
1) CDMA 800MHz  
2) Dimensions:  44.5*28.5*7.85mm  weight: 8.5g
3) Operating Temperature Range: -30 C~+75 C
4) Storage Temperature Range: -40C~+85C
Performance:
5)Operating Voltage Range: 3.3V~4.25V/Typical: 3.9V
6) Current Consumption Typically: Idle Current: 5mA@-75dBm Call Current: 230mA@-75dBm Max Current: 630mA@-104dBm
7) TX Power: 800MHz: Class III (23dBm~30 dBm)     RX Sensitivity:-104dBm

Interfaces:
1)  40Pin+10Pin Connector   U.FL-R-SMT 50Ω Atenna Connector  Antenna Solder Pad
2) Integrated Full Duplex UART: AT/Data
3) USB 1.1 Device: Debug   UIM Card Interface: 1.8V/3.0V

Data Features:
1) CDMA2000 1X 
2) Max Downlink: 153.6Kbps  Max Uplink: 153.6Kbps
3)Internal TCP/IP& UDP/IP  Protocol Stack 
4) TCP Server/Client
5) Embedded FTP  Cell Indication

SMS Features:
1) Support TEXT Mode 
2) Point-to-Point MO/MT
3) SMS Cell Broadcast

Voice Features:
1) Double Channels&High-quality Voice
2) 2SPK/2MIC Analog Audio
3) Vocoders EVRC & 13K QCELP
4) Echo Cancellation  Volume Control  Support DTMF&PCM

AT Command Set
Common AT Commands  ZTE Proprietary AT Commands