In IOT systems, a modem is needed to transfer information. The equipments that are produced today usually have internal modems, but the equipments used in the past years need separate modems to transfer information. As a result, industrial modems are used to connect industrial equipment that do not have IOT capabilities. The production modem of this company has the ability to receive and send values, under the RS232 protocol, from data loggers. One of the capabilities of this modem is to work with all types of SIM cards from Rightel, Irancell and Mobile First. So that without the need for any settings in the modem, the mobile network associated with any type of SIM card is known. In addition to GPRS, SMS can also be used as a backup communication method when necessary.