SMS sending with a phone or modem connected to the PC

If you are planning to send less than 4000 SMS a day from your office computer or IT environment, than installing an SMS service with GSM modem connection is the best option. The system can be set up in a day and it is very easy to maintain.

What do you need?

This solution requires a GSM modem (or a mobile phone), a SIM card, a data cable that can be used to connect the GSM modem (or mobile phone) to your PC and an SMS gateway software. For long term operations it is best to use a professional GSM modem, such as a Wavecom Fastrack, a Siemens or a Multitech modem. For testing purposes any mobile phone will do. The SIM card needs to be placed inside the GSM modem and it will determine the phone number and the SMS cost. When you purchase your SIM card, it is worth to consider choosing a tariff package which offers favorable text message prices. There is a good chance you can find a plan that offers free or very low cast SMS messages. The data cable can be RS232 or USB. RS232 is a better choice, because it does not require you to install a driver.

The SMS gateway software should be Ozeki NG SMS Gateway because it supports all mobile phones and modems, that make SMS sending possible. Ozeki NG SMS Gateway handles all international characters, long (multipart) messages and provides several easy to use interfaces that allow you to add automated SMS functionality to your IT system.

prerequisites for ozeki ng sms gateway
Figure 1 - Prerequisites for Ozeki NG SMS Gateway

Your checklist:
SIM Card
Data cable
Ozeki NG SMS Gateway (Download from

Where can you obtain them?

The SIM card can be purchased at any mobile service provider. The GSM modem, the data cable and the Ozeki NG SMS Gateway can be obtained from Ozeki Informatics Ltd. To get a quotation, please send us an e-mail. In the e-mail tell us that you are interested in the SMS gateway software and/or the GSM modem needed to connect your system to the mobile network.

For detailed setup instruction on how to configure GSM modems, please go to "GSM modem configuration page.

Further reading: