Increase of demand regarding multimedia services and its supply through broad band access networks such as: GPRS, Third and Fourth Generation of LTE cellular networks, WiMAX, ADSL and FTTX require an increase in transmission network capacities of city, inter-city and country's infrastructure. Since DWDM systems are capable of merging and transmitting a high number of optical wavelengths on one optical fiber each of which can transport any type of signal including SDH, Ethernet and etc. with any bit rates, therefore implementing DWDM optical transition systems is the only answer and alternative to rapid increase of optical fiber networks capacity close to infinity.

     Nowadays Optical fibers exist in most areas, although transmitting a signal or a channel using optical fiber may not be responsive to traffic needs of that route and a high capacity is required which Considering this situation DWDM systems shall be implemented, by execution of fiber line project to houses, passive form of these systems are going to be implemented in accesses network and traffic accumulation. This solution in addition to its flexibility according to client’s needs and requirements, there are no chances for security abuse specifically in network management section and these are main advantages of this solution.

     Activities of FANA has been started under support of Iran Telecommunication Research Center and by executing "manufacturing design of CWDM systems" project in 2005 and progressed by designing and manufacturing DWDM systems in 2007. These systems have been implemented and commissioned vastly in telecommunicational infrastructure networks of the country and proceeded by clients' contentment after receiving the type approval accreditation by Communications Regulatory Authority (CRA) of The I.R. of Iran. At the moment these science-based systems have been developed and modified to 96-channel DWDM based on OTN, ROADM system, standard network management system (MTNM and SDN based), media converter, Aggregator, Ethernet switch, Optical network designer software and also increase of signal transfer rate according to 200/100 Gbps standards.