Requirement at the AAI Bhavnagar was to connect three of their remote sites to ATC Tower. The three sites were as follows.

• DVOR Site, GP Site and LLZ Site.
• We used three high end Radwin RF Point-to-Point Links. One end for all three links was ATC Tower and the other end was the three above remote sites.
• Primary requirement was to create connectivity between equipment installed at remote sites to their corresponding equipment at the central ATC site.
• The Serial End of the converter was connected to the the serial port of respective equipment and the ethernet end to the switch. The switch is in turn connected to Radio Link using PoE.
• Similar, Mirror network is at the central end, where the date is received at switch from Radio link which is connected on Ethernet Port to Serial to Ethernet Converter and then the data is feed to the main equipment through the serial port of converter.
• But the Radio link has high bandwidth can be used for various other purposes. Here, at Bhavnagar, the remote sites don’t have telephone networks. So the Radio links were used to provide the connectivity.
• A FXO VOIP is installed at the ATC end and is connected to the existing telephone network. One FXS VOIP is installed at each of the remote sites. Normal analog phones were connected to FXS VOIP at remote site to establish communication.
• Additionally, multiple Switches are also supplied and installed to establish network.
• A Desktop Computer is supplied for monitoring at the ATC site.
• The system has been running successfully for more than two years and now it is being maintained under AMC.
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