Telecommunications operating companies are asked to provide new services for the short- and medium-term. Therefore, their systems and infrastructure must evolve in order to support these services. Several technological options are already available and to choose the best among them is a big challenge for network planners. This work proposes a mixed-integer linear programming model devoted to help the planning of the so-called access network, which links the clients to the core of the telecommunications systems. The model is driven by max-revenue criterion and focuses on the network evolution under the assumption of imprecise estimates concerning services' penetration rates. In order to perform some techno-economical risk analyses, fuzzy sets concepts are adopted. An application that uses actual data is reported.2 601605Humphrey, M., Freeman, J., How xDSL supports broadband services to the home (1997) IEEE Network, 11, pp. 14-23. , January/FebruaryCook, A., Stern, J., Optical fiber access - Perspectives towards the 21st century (1994) IEEE Comm. Mag., 32, pp. 78-86. , FebruaryLinna, P., Opportunities for broadband radio technologies in the access network (1998) EURESCOM Project P614 - Deliverable 4Ims, L.A., Stordahl, K., Olsen, B.T., Risk analysis of residual broadband upgrade in a competitive and changing market (1997) IEEE Comm. Mag., 35, pp. 96-103. , JuneCarlson, C.M.F., Formigoni, J.R.F., Tavares, H.M.F., Dealing with fuzzy costs in telecommunications networks design (1998) Proc. of the FUZZ-IEEE 1998, 1, pp. 634-639. , MayCarlson, C.M.F., Tavares, H.M.F., Formigoni, J.R.F., Parametric mixed linear programming with fuzzy numbers and an application to telecommunications networks planning (1998) Procs. of the SBT/IEEE International Telecommunications Symposium, 1, pp. 323-328. , (São Paulo)AugustDeSousa, M.A., Maximal revenue-oriented access network planning (1999) Proc. of XVII Brazilian Symposium on Telecommunications, pp. 389-394. , (Vitória)SeptemberPedrycz, W., Gomide, F., (1998) An Introduction to Fuzzy Sets: Analysis and Design, , MIT Press, CambridgeCampos, L., Verdegay, J.L., Linear programming problems and ranking of fuzzy numbers (1989) Fuzzy Sets and Systems, 32, pp. 1-11High speed optical access systems based on passive optical network (PON) techniques (1998) ITU Draft Recommendation G.983, , ITU