Proximus supplies integrated telecommunications services on the Belgian market. Co.'s activities are divided into four segments: Consumer Business Unit (CBU), which sells voice products and services, internet and television, on fixed and mobile networks, to residential customers; Enterprise Business Unit (EBU), which caters to professional customers; Service Delivery Engine and Wholesale, which centralizes all the network and IT services and costs, provides services to CBU and EBU and sells these services to other telecom and cable operators; and International Carrier Services, which focuses on international carrier activities.

TKH Group creates and supplies Telecom, Building and Industrial Solutions. Telecom Solutions develops, produces and supplies systems ranging from outdoor infrastructure for telecom and CATV networks through to indoor home networking applications. Building Solutions develops, produces and supplies solutions in the field of electro-technology ranging from applications within buildings through to technical systems that - combined with software - provide solutions for the care and security sectors. Industrial Solutions develops, produces and supplies solutions ranging from specialty cable, "plug and play" cable systems through to integrated systems for the production of car and truck tires.