This Practice Note provides an overview of the types of communications services commonly outsourced and the reasons for outsourcing. Typical outsourcing structures are also explored, together with key provisions, service levels, benchmarking, warranties and additional issues. Communications outsourcing 'Outsourcing' broadly means the contracting out of a business process or function to another party. Examples of functions which might be outsourced include human resources, payroll processing, IT, customer services, finance and accounting. The outsourcing of communications takes many different forms. While there is no legally approved definition, communications outsourcings usually involve the outsourcing of services associated with voice and/or data communications in some form. Such outsourcings can be: • full outsourcings, involving the outsourcing of a fully functioning private communications network • managed service outsourcings, or • more specific outsourcings, such as the support and maintenance of telecoms apparatus to data centre outsourcing, or the procurement of the supply of handsets A regulatory environment Electronic communications is a regulated sector and providers of electronic communication services (ECSs), electronic communication networks (ECNs) and associated facilities are subject