Data, Fax, Voice and Messaging function
Application: control GSM Modem receiving and sending SMS through RS232 or USB interface on a computer or a single chip.
· Voice function call emergency call speech coder and decoder: full rate, enhanced full rate and half rate (FR/EFR/HR) dual tone multiple frequency function (DTMF) 
· Data/fax function asynchronous data circuit, transparent and opaque data to the highest standards 14400 bits/s the third type of automatic fax machine (Class1 and Class2) MNP2, V42bis
· Messaging function text and PDU point-to-point (MT/MO) cell broadcast

GSM Additional Functions
· call transfer
· call barring
· MPTY
· call waiting and call holding
· caller ID
· call charge prompt
· unstructured supplementary service data（USSD）
· closed user group
· show call transfer

Other Functions 
· open software platform（support the embedded systems of user application）
· ME＋SIM address book management
· fixed dialing
· SIM card value-added services Class2
· SIM card, card locked function of network and service provider
· real time clock
· alarm manager
· XMODEM protocol software upgrading
· support the text UCS2 

Available accessories （for RS232）：Power Supply *1; RS232 Data Cable *1; Antenna *1 

Available accessories （for USB）：USB Data Cable *1; Antenna *1