A methodology design of a Telecommunications Infrastructures for medium-sized campus university is proposed, it is applied at La Dolorosa Campus of the “Universidad Nacional de Chimborazo” to guaranteed access to online services. Different standards of Fiber Optics, UTP and WIFI publications made by the ITU and the IEEE, and the ETSI standard EG 202 057-4, on Internet quality accesses, IP telephony codecs, articles on ICT in Education were used. This research analyzed the state of the art regarding telecommunications infrastructures, studied and determined the services required by university campus networks and the traffic generated by each of the services, as well as the design of the telecommunications infrastructure according to the determined parameters. Among the main results it is evident that there are 1592 devices that can generate 6537.60Mbps in high quality and 100% of users, and 543.28Mbps in acceptable quality with concurrent users, and using a GPON network with the standard G.987.2 can transmit all the generated traffic. A methodology is presented for the design of optimal telecommunications infrastructures for the requirements found at the study site