Free-space optical equipment revenue Figure 9-12 Revenue growth projection for FSO equipment. Source: Strategis Group Chapter 9 9.3 Deployment of FSO Given the fact that no spectrum license for deploying an FSO system required, typically an optical wireless system with a point-to-point topology can be installed and brought into operation in approximately one hour or less. However, this is only true when a suitable line of sight is identified quickly. 9.3.1 Implementation of FSO Systems In order to ensure a smooth and quick implementation of an FSO system, it is advantageous to follow the five-phase process depicted in the following list: First phase Site Acquisition and Zoning Second phase Site Survey Third phase Site Preparation Fourth phase Commissioning Fifth phase System Test and Acceptance The Site Acquisition and Zoning (first) phase includes determining the proper rooftop locations for placing laser transceivers and obtaining building-owner approval for a rooftop installation. The Site Survey (sec- ond) phase is needed to ensure that each proposed rooftop location meets all network requirements (such as line of sight) and is evaluated for fea- sibility and accessibility. The purpose of the Site Preparation (third) phase is to prepare architectural and engineering drawings and specifi- cations, obtain construction permits, install power to the rooftop location, and install tripod or mount support for the transceivers. The purpose of the Commissioning (fourth) phase, a critical phase in the entire deploy- ment process, is to commission a new transceiver unit into the network. The Commissioning phase includes powering up the equipment, verify- ing the software, establishing wireless optical links with other trans- ceivers within the network, setting up a network management channel back to the NOC, and the verifying proper operation of the wireless opti- cal links. The System Test and Acceptance (fifth) phase contains the ification of system configuration and end-to-end functionality as well as system performa