Installation: 4+N (1 wire per dwelling). The doorman kits for buildings include all the necessary equipment for a complete installation and immediate operation. Includes: 4857.- CITYLINE 4+N 7AP209 plate and embedding box (Embedding box included ref. 8857). S7 entrance panel: 130 (H) x341 (V) mm. S7 embedding box: 115 (H) x328 (V) x45 (P) mm. 3393.- LOFT BASIC 4+N telephone (18 units). 4802.- 12VAC/1A power supply. DIN4.