For the purposes of this Regulation, the following definitions shall apply:

1. (a)

   ‘Central SIS II’ means the technical support function of SIS II containing a database, the ‘SIS II database’, and a uniform national interface (NI-SIS);

2. (b)

   ‘C.SIS’ means the technical support function of SIS 1+, containing the reference database for SIS 1+ and the uniform national interface (N.COM);

3. (c)

   ‘N.SIS’ means the national system of SIS 1+, consisting of the national data systems which communicate with C.SIS;

4. (d)

   ‘N.SIS II’ means the national system of SIS II, consisting of the national data systems which communicate with Central SIS II;

5. (e)

   ‘converter’ means a technical tool to allow consistent and reliable communication between C.SIS and Central SIS II, ensuring the functionalities provided for in Article 10(3) and allowing the conversion and synchronisation of data between C.SIS and Central SIS II;

6. (f)

   ‘comprehensive test’ means the test referred to in Article 55(3)(c) of Regulation (EC) No 1987/2006;

7. (g)

   ‘test on supplementary information’ means functional tests between the SIRENE Bureaux.