The present document develops a set of normative interoperability requirements for the Network Function Virtualisation (NFV) hardware ecosystem and telecommunications physical environment to support NFV deployment. It builds on the work originated in ETSI GS NFV 003 [i.3]. The present document focusses on the development of requirements to enable interoperability of equipment in the telecommunications environment to support NFV deployment. The following areas are examined: ? Operations ? Environmental ? Mechanical ? Cabling ? Maintenance. ? Security