Trans-European Networks, or TENS, in transport, telecommunications, and energy, support projects of common interest where immediate commercial prospects and benefits are uncertain but that promote interconnection and interoperability of and universal access to national transport, telecommunications, and energy networks. In order to assess the future needs and prospects for the TEN Telecom Action and to develop a vision by which to revise its guidelines, this document presents a technology foresight study examining emergent technological solutions and needs, a survey among sector users, and in-depth interviews with sector members.