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The Internet Radio Linking Project, also called IRLP links amateur radio stations around the world by using Voice over IP (VoIP). Each gateway consists of a dedicated computer running custom software that is connected to both a radio and the Internet. This arrangement forms what is known as an IRLP Node.
Westell Model 6100 AXXDSL DSL router. A digital subscriber line (DSL) modem is a device used to connect a computer or router to a telephone line which provides the digital subscriber line (DSL) service for connection to the Internet, which is often called DSL broadband.
Westell was founded in October 1980 in Willowbrook, Illinois, and initially produced electronic equipment used for signaling and transmission on telephone lines leased to private customers. Clinton Penny, who had previously founded Wescom Switching, founded Westell. [4] Beginning in 1992, Westell began developing ADSL products.
From the system point of view, it is essentially VoIP with push-to-talk. To the user it can be implemented like any other radio network. With RoIP, at least one node of a network is a radio (or a radio with an IP interface device) connected via IP to other nodes in the radio network.
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Mesh routers forward traffic to and from the gateways, which may or may not be connected to the Internet. The coverage area of all radio nodes working as a single network is sometimes called a mesh cloud. Access to this mesh cloud depends on the radio nodes working together to create a radio network. A mesh network is reliable and offers ...
The most common operating system on such embedded devices is Linux. Less frequently, VxWorks is used. The devices are configured over a web user interface served by a light web server software running on the device. It is possible for a computer running a desktop operating system with appropriate software to act as a wireless router.
Like any other digital communications system that uses analog media, packet radio systems require a modem. Since the radio equipment to be used with the modem was intended for voice, early amateur packet systems used AFSK modems that followed telephone standards (notably the Bell 202 standard). While this approach worked, it was not optimal ...