A method for simulating a telecommunications network through objects that model a respective set of network modules or devices provides for the insertion, for every module or device of the set, of at least one respective interfacing object with the other modules of the set. The above interfacing object has an external side and an internal side with respect to the module or device. Such external side has a character that is independent of idiosyncrasies of such module or device and is therefore uniform for all modules or devices. When there are a plurality of different implementations of the same module or device, it is possible to provide both a unique interfacing object for all different implementations, and a respective interfacing object for every single implementation.