In the project "Wave propagation for wide band waveform" the possibility to provide OPNET with a more realistic link model is investigated. In this report we describe all OPNET related questions that are considered in the project. Two different link models have been implemented in the project; one based on using more realistic link attenuation values and one based on estimating the channel capacity. Both models uses OPNET:s existing link model structure so that it should be simple to use them in existing models.