A query string is the portion of a URL where data is passed to a Web application and/or back-end database. The reason we need querystrings is that the HTTP protocol is stateless by design. For a website to be anything more than a brochure, you need to maintain state (store data). There are a number of ways to do this: On most Web servers, you can...
Radio over Internet Protocol (RoIP) is a technology for transmitting radio communication signals using the Internet Protocol (IP) standard. RoIP provides the same performance as well-enhanced radio communication but uses a digital IP network to enable communication and connection between two or more analog radio devices or radio networks.
RoIP is similar to a VoIP network, but with radio communication features and abilities. RoIP works in a half-duplex mode where only one radio device can communicate at a time. The user must push the push-to-talk (P2T) each time before communicating. Besides standard radio communication features, RoIP enables the connection of two or more radio sites together using digital-to-analog converting receivers at both ends, which are directly connected to an Internet backbone. Moreover, RoIP also enables interoperability between different radio networks with different and non-compatible architecture.
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