The ARCEP issued a Recommendation dated 25 April 2013 aimed at ensuring the interoperability of the fiber-to-the-home (FttH) networks in a standardisation approach. Within the FttH network development framework, the definition of an identifier for each line which could be used for any intervention of this line is a necessary step.

The ARCEP thus recommends the implementation of a unique identifier, with a standardised format of 10 characters, having to be granted by an identifier manager to each line. The identifier will have in principle to be labelled on the optical terminal plug in order to ease its visibility by the subscriber and the different interveners. It is also considered that it appears on the invoicing support and on the Internet customer space of the operator.