A large number of projects of different scale and degree of complexity has been completed. The projects were meant for different IP/MPLS networks of the communications operator: fixed communication networks ensuring operation of different services of the clients (VPN, etc.); multiservice transport network designated for high-performance traffic of the mobile operator’s network; urban networks. To improve the performance, reliability and quality of the services, multiservice IP/MPLS networks were built and upgraded using equipment by various manufacturers, and network audits were performed. A large share is attributed to the projects of creating or upgrading the primary networks of the operator (DWDM, SDH) using equipment by various manufacturers.