Global System for Mobile Communication (GSM) modem is a specialized form of modem that operates over paid subscription bases to an instant network, exactly like a mobile phone. It accepts a Subscriber Identity Module (SIM) and actually performs like a cell phone for computers. This kind of modem can be used as a separate cellular phone that the computer can use for GSM network capabilities. Traditional modem is attached with computers allowing dial-up link with other remote computer systems. It also functions in a quite similar manner, with an exception that it sends and receives data through radio waves as opposed to a telephone wire. This kind can be an external device connected using a USB (Universal Serial Bus) cable or perhaps a serial cable. Commonly it is a mini device that may be plugged straight into the USB port or card slot of a PC or even a laptop.
It is a communication device like its ancestors having wires, but while the service is on paid subscription bases, it will have installed a SIM card. This card can connect the modem to the appropriate company and identifies the unit user to its carrier network. In this manner, it functions almost like a mobile phone; as a matter of fact, many mobile phones make use of SIM cards for the said purpose. The SIM cards actually contain all the consumer data like subscription, membership and caller’s logs etc. these SIM cards usually are inter-changeable among GSM modems and GSM cell phones. Similarly dial-up modem converts analog signals to digital and vice versa, GSM modems convert digital data to SMS (Short Message Service) message for sending or receiving message over the wireless phone network. SMS messages are small packets of electric data that is sent and received the same as the info packets on dial-up modem.
GSM Cellular Modem
Several new brands of third-generation (3G) and fourth-generation (4G) expensive smart phones are using GSM technology so they can work as wireless hotspot for computer when required. They can easily be connected to the computer via USB cable as well as with out a wire over a wide-fidelity (Wi-Fi) network and also via Bluetooth. This enables user to access the Websites using their smart phone working as a GSM modem as opposed to a conventional Wi-Fi connection. All the users who have an unlimited data package on their cell phone, this can be a cheaper solution than paying extra for another Internet access, or paying money as a link fee or even a membership for a public Wi-Fi hotspot.