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TV Network Protocol
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<h2 id="replacement-by-dvnp-protocol">Replacement by DVNP Protocol</h2> <p>A digital replacement of TVNP has been produced by Costain, Highways England, Transport for London and the Metropolitan Police called <a href="http://content.tfl.gov.uk/tfl-cctv-sharing-publication-final.pdf">[1]</a> DVNP or Digital Video Network Protocol. DVNP uses IP networks to link CCTV systems from different manufacturers with control message sent using <a href="/facts/Hypertext_Transfer_Protocol/TWtvf7JD">HTTP</a> GET messages and video streamed using standard video streaming protocols like <a href="/facts/Real-Time_Messaging_Protocol/6rpAXGgk">RTMP</a> and <a href="/facts/Real_Time_Streaming_Protocol/he6ChB16">RTSP</a>. DVNP allows for User Authentication, Live viewing, PTZ control and Replaying of recordings from connected CCTV systems. </p><p>There are currently three known implementations of DVNP </p> <ul><li>Costain (who bought Simulation Systems Ltd / SSL) <a href="https://www.costain.com/media/598710/costain-paper_technology-for-connected-place-7-mb.pdf">[2]</a></li> <li>Synectics</li> <li>Open Source Implementation on GitHub <a href="https://github.com/RogerHardiman/DVNP/blob/master/README.md">[3]</a></li></ul> <p>In 2020 DVNP was specified in the Silvertown Tunnel project <a href="https://content.tfl.gov.uk/silvertown-tunnel-schedule-10-design-and-construction-requirements-rs-feb-2020.pdf">[4]</a> </p> <h2 id="see-also">See also</h2> <ul><li><a href="/facts/OSI_model/oxN9Xhjz">OSI model</a></li> <li><a href="/facts/Closed-circuit_television/1JCtvSmx">Closed-circuit television</a></li> <li><a href="/facts/High-Level_Data_Link_Control/aTndRUQ3">High-Level Data Link Control</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>"Acquisition of Simulation Systems Limited ("SSL") | Costain". <a href="http://www.costain.com/news/news-releases/acquisition-of-simulation-systems-limited-ssl/" target="_blank">http://www.costain.com/news/news-releases/acquisition-of-simulation-systems-limited-ssl/</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> </ol>