ETSI TS 102 656 gives guidance for the delivery and associated issues of retained data of telecommunications and subscribers. It provides a set of requirements relating to handover interfaces for the retained traffic data and subscriber data by law enforcement and other authorized requesting authorities.

The present document describes the requirements from a Law Enforcement Agency's (LEA's) point of view.

Not all requirements necessarily apply in one individual nation.

These requirements may be used to derive specific network requirements and furthermore to standardize handover interfaces.

The present document gives the requirements for the delivery of Retained Data (in line with TS 101 331 [1] for LI).

NOTE: Reading the present document it should be taken in account that:

• Limitations in what data to be retained are a national issue.