In a debate held during Perspectives17, collaborative work emerged as a fundamental point in the experiences of network modernization. For Steven Bruny, COO of GENBAND, the pressure is once again on the network: besides being reliable, it has to provide necessary safety conditions. This is why for the evolution towards NFV / SDN the associative work between different partners and the operator is necessary. On the other hand, the official stressed the importance of Voice over LTE to improve voice services.