Redline's Wireless System Improves Public Safety in Queretaro
The City of Santiago de Queretaro in Queretaro state Mexico was founded in 1531. With the population nearing a million people and tourism becoming a major economic engine the public safety department decided to improve security and traffic flow for its citizens and tourists by installing a video surveillance system throughout the city.
Without a wired data infrastructure a wireless network was the only choice to connect the cameras. However, Queretaro's topography and several laws protecting Mexico's historic buildings meant selecting the right wireless system would be critical. The challenge was to select a system that performed well despite line-of-sight issues and a system with significant capacity to minimize issues with laws that prohibit even the government from disrupting the surrounding soil or attaching equipment to the exterior of historic buildings.
RETO Industrial, a telecommunications integrator in Latin America, recommended a broadband wireless CCTV network infrastructure using Redline's award winning AN-80i operating in the 4.9 GHz public safety band to connect cameras situated in strategic locations throughout the city.
- Connect video surveillance cameras
- Maximize coverage to minimize impact on historic architecture
- Provide reliable video in a tough urban environment
Urban areas present significant line-of-sight issues due to the topography, buildings and foliage that come between the cameras and the sector controllers. The AN-80i achieves the highest possible signal integrity within the 50 MHz bandwidth constraint of the 4.9 GHz public safety band thus delivering excellent non-line-of-sight (NLOS) range by using innovative third generation orthogonal frequency-division multiplexing (OFDM) technology.
The cameras, each with maximum (4CIF) video resolution, were mounted on public utility poles already in place throughout the city which mitigated issues related to the laws governing historic sites. The low power consumption of the AN-80i allowed the wireless system and cameras to be powered via Power over Ethernet (PoE) derived from the existing utility network thereby saving hundreds of dollars of installation costs per site.
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