Andrew Corporation says it is supplying Ericsson with a comprehensive RF coverage solution for the Rio de Janeiro, Brazil subway. The Rio subway system integrates Andrew multioperator remote optical repeaters and boosters with RADIAX coaxial cable, connectors, and accessories. Ericsson is commissioning, designing, and installing the solution to adapt Claro's cellular communications system from TDMA to dual mode TDMA and GSM. Claro is one of the leading mobile communications operators in Brazil and is a subsidiary of America Movil. The adapted system was completed in November 2003 providing over one million Claro customers with clear cell phone communications throughout the Rio subway.
Rio de Janeiro's metropolitan subway system, opened in 1979, has two main lines and 24 stations. Line 1 (14.5 km long) runs from Arcoverde station on Copacabana Beach underneath the Sao Joao Mountain and north to the city center. The Arcoverde subway station is literally inside the Sao Joao Mountain, 59 feet below sea level and is connected to the street by 8 escalators and moving sidewalks. Line 2 (22 km long) runs from Estacio station to the suburbs. The subway lines also have connections to several suburban rail lines.
The new communications system uses over 18 kilometers of Andrew RADIAX RC7-CPUS-2-RN cable, with connectors and accessories, and is integrated with Andrew multioperator remote single band and dual band optical systems that bidirectionally amplify signals between multiple mobiles and base stations. These repeater units are typically deployed in dense urban environments, tunnels, canyons, and other areas where physical structures impede the RF signal. In the Rio subway, there are three master units that provide RF connectivity and administer some thirteen optical remote units. By using these systems, RF coverage can be provided to in-tunnel and in-station locations."
Posted to the site on 2nd December 2003
Posted to: www.cellular-news.com/story/10220.php