PLC Networking of A Four Stars Hotel

Project Intro: 
　　It is a four star hotel and requires broadband internet access for its guestrooms locating on 7 - 22 floors. 
　　A power shaft goes from 1st floor to the top floor, and the power distribution box for each floor is just in the shaft. As there is a huge number of guestrooms in the hotel and DHCP service is required, we hereby use PLC Routers (FPR-10M) for internet access. 
　　 The internet access point will be on 6th floor where a router is placed there. A switch will connect the PLC routers locating in low voltage distribution boxes on each floor via vertical cables. With adaptors, we directly inject the signals into three phase power line in the distribution box. 
　　The hotel requires that internet access must be available in all guestrooms of floors among 7 - 22. The hotel shouldn't be closed up for networking purpose, and no damage to the existing decorations and disturbance to the guests is allowed.
Solution: 
　　Each floor is placed with a PLC router and  an adaptor. Signals are injected into the three phase power line in the low voltage distribution room and cover the whole floor with internet access. 

We finished networking construction without entering any guestroom and any interference to the hotel's business.