Cable television networks have gradually become one of the more important media in China after years of development. Real time monitoring of television broadcast content and transmission quality is currently an important task for the management of the broadcasting and television industry. Currently, some front-end broadcasting units still use manual monitoring. With the increase in the number of TV programs, timely detection of broadcasting accidents through television monitoring systems and the use of advanced digital technology monitoring methods to replace manual monitoring have become a development trend. Recently, the Kodi 7121 series emergency switch has been successfully used in the broadcast monitoring and alarm system of Changsha TV Station, and has won a good reputation for its excellent performance and advanced technical indicators.

The Kodi 7121 series emergency switcher is divided into two models: manual emergency and automatic emergency. It uses digital signal dedicated relay switching technology to control the on/off of the output circuit, and has a power-off direct connection function. It can automatically detect whether the main and backup signals are interrupted, black fields, or still frames, automatically switch or play signals, and the adaptive cable balance distance can reach 300 meters, effectively solving the transmission problem of digital signals. It is currently a dedicated emergency equipment in China that can truly and effectively solve the safe broadcast of digital front-end signals in real time.

Dalian Kodi has been working in the broadcasting and television industry for more than ten years. Its products can adapt to uninterrupted working conditions of 7 × 24 hours, with an average time between failures of more than 30000 hours, all of which meet or exceed the first-class standards of broadcasting and television. Based on its technological advantages, Kodi's products are distributed in more than 100 provincial and municipal television stations and radio stations across the country.