Rural telephone networks deployed in Peru since 1998 and funded by the universal access fund are at a critical moment, facing severe sustainability problems. In response Peru's regulator -OSIPTEL- proposed a system of differentiated interconnection charges, depending on whether the network was urban or rural, and called for a public consultation. DIRSI through its MARTA program, responded to OSIPTEL with a report by Raul Perez Reyes. In it he suggests that the differentiation of interconnection charges proposed by OSIPTEL should not be made in isolation from other regulatory measures, especially those that should underlie the methodology to regulate the tariffs and charges for access to rural networks. The full report is only available in Spanish.