Global System for Mobile Communication (GSM) modem is just a specialized form of modem that operates over paid subscription bases to an instant network, exactly just like a mobile phone. It accepts a Subscriber Identity Module (SIM) and actually performs like a cellular phone for computers. This type of modem can be used as a separate cell phone that the computer can use for GSM network capabilities. Traditional modem is attached to computers allowing dial-up connection to other remote computer systems. In addition, it functions in a quite similar manner, having an exception so it sends and receives data through radio waves instead of a telephone wire. This type is definitely an external device connected with a USB (Universal Serial Bus) cable or a serial cable. Commonly it is just a mini device which can be plugged straight into the USB port or card slot of a PC or even a laptop.
It is just a communication device like its ancestors having wires, but as the service is on paid subscription bases, it will have installed a SIM card. This card can connect the modem to the correct company and identifies the unit user to its carrier network. In this manner, it functions almost like a cell phone; as a matter of fact, many mobile phones utilize 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 within the wireless phone network. SMS messages are small packets of electric data that will be sent and received the same as the data packets on dial-up modem.
GSM Cellular Modem
Several new brands of third-generation (3G) and fourth-generation (4G) expensive smart phones are utilizing GSM technology so that they may work as wireless hotspot for computer when required. They are able to easily link to the computer via USB cable or even without a wire over a wide-fidelity (Wi-Fi) network and also via Bluetooth. This enables user to gain access to the Online sites employing their smartphone working as a GSM modem instead of a conventional Wi-Fi connection. Most of the users who have an unlimited data package on their smartphone, this is a cheaper solution than paying extra for a separate Internet access, or paying money as a connection fee or a membership for a public Wi-Fi hotspot.