29 April 2003 London--Colombia voice provider Telenariño is to build a metropolitan access network based on RAD Data Communications product solutions.
The new network will provide data services over existing infrastructure to the entire metropolitan area of Pasto, southwestern Colombia.
A tender, in which a number of vendors, including Alcatel, Marconi and Siemens, participated, has been awarded to Insitel, a RAD reseller in Colombia, which will supply the equipment and provide technical support.
"The solution complied with all the technical requirements and offered excellent cost-performance," said Gustavo Santacruz, RAM Support Engineer at Telenariño.
The new network - RAM/MAN (Red de Acceso Metropolitana/Metropolitan Access Network) - is designed to deliver high and low speed dedicated connections to different types of customers, including universities, government offices, banks, enterprises and national carriers such as AT&T, I&T, Telecom Colombia, Alcatel, Teledifusión and Telefónica Data.
"We implemented DSL to breach the long distances within the city, with HDSL, IDSL and MSDSL modems deployed at the customer premises," explains Andres Hernandez, Project Manager at INSITEL. "Moreover, HDSL improves the quality of poor grade copper lines present in some locations." The RAD modems provide low and high speed data via various interfaces, such as V35 and V.24, and work opposite LRS-24(tm) modem racks or Megaplex(tm) multiplexers at Telenariño's points-of-presence (POPs) and central site.
STM-1 rings were built using existing fibre cable to provide additional capacity for the new data services, which are delivered to the customer sites over multiple E1 lines. RAD's DXC-STM-1(tm) multiservice access node and add-drop multiplexer and R-STM-1(tm) digital multiplexer provide access to the SDH rings.
Helver Delgado, Chief of Services Management Division at Telenariño, said, "The RAD solution provides 1+1 redundancy protection and redundant E1 links." Telenariño is already delivering data to 70 subscribers, and expects this number to grow to 110 by the end of this year.