GLOBAL SYSTEM FOR MOBILE COMMUNICATION
(GSM)
GSM modem is specialized type of modem that operates over subscription based wireless networks which is similar to a mobile phone. A GSM modem accepts a SIM card, and basically acts like a mobile phone for the computer. Traditional modem is attached to computers for ‘dial-up’ to connect with other computer systems. A GSM modem operates in a similar fashion, except that it sends and receives data through radio waves rather than a telephone line.
Besides the dial-up connection, GSM modem can also be used for sending and receiving SMS which is also one of the key features of GSM modem. Some of the features of this GSM Modem are as follow:
· RS-232 Interface
· Tri-Band: GSM900, GSM1800 and GSM1900
· Support TCP/IP
· Support standard extended open AT commands
· Support GPRS class 10
· Accept supply voltage from 5 to 12V
· Support PDU and Text mode for SMS
Example GSM Rs-232 modem
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