This document is the abstract of a thesis that aims to develop an appropriate model for forecasting SMS traffic in the Jabotabek area of Indonesia using univariate forecasting methods. The thesis uses ARIMA and artificial neural network (ANN) methods to forecast GSM SMS traffic data from March to June 2011. The results showed that a single hidden layer ANN model produced the most accurate 7-day forecasts in terms of smallest error measures like RMSE, MAPE and SMAPE.