Unbundling of the Access Network Elements created a new environment where various competing companies install, operate and maintain networks in the same location. This is a very complex task and some important issues have to be taken into account to allow those operators to cohabitate without problems.

To guarantee a stress-free environment some regulatory, legal and administrative criteria and rules must be adopted, besides the proper technical solutions. It ensure the network integrity, availability and quality of services, easy use of equipment, interoperability and physical access security. Standardization is a fundamental role played on a worldwide basis by ITU-T’s Outside Plant Study Group and the main results on a Questionnaire issued by the are summarized in this presentation.