Contract K503 includes electrical systems with building parts, mainly in connection with

integrated communication as well as telephony and calling systems stated in chapter. 5 in NS3451:2009

the building part table. These are as follows:

— 522 Network equipment (excluding a safety network and equipment for central building operations).

— 523 Exchange equipment (excluding a safety network and equipment for central building operations).

— 524 Terminal equipment (PCs, excluding a safety network and equipment for central building operations).

— 532 Telephony systems (telephone systems and telephone equipment).

— 539 Other parts involving telephony and calling system (Emergency network, measures for covering).

— 59 Other installations for telecommunication and automation (system for POS

and register systems).