GSM Modem

Interfacing your own equipment to GSM devices has been made difficult by the manufacturers because they don’t use standard connectors, very little information is made available, and a few other similar reasons. This is a pity since the AT command set has been extended especially for GSM. These AT commands have been used for years in ordinary modems and are fairly easy to use. The arrival of GSM has led to the addition of a number of commands, making the sending of SMS messages and such like possible.