Following the need to know the different variables that affect the data transport services, the shortage of academic papers that describe the behavior of the demand in the telecommunications wholesalers market and taking as a reference the work done by Madden y Coble-Neal (2004) and Karacuka, Haucap y Heimeshoff (2011), it’s presented both a demand model, as well as a price formation model, estimated trough firms-level panel data techniques, aiming to understand the behavior of those firms in the Colombian market and which main results are a demands price elasticity of -0.2768, an inverse price elasticity of -0.0288 and finally an income elasticity of 0.038, for the firms providing the services to final client.