BBC Red Button it exits the service. Usage of these boxes dwindled further as technology developed. They used "original" technology and as such were not upgradable. Following each regional changeover to full digital TV broadcasting, the remaining units are no longer of use, as they do not support the "8K-mode" for DVB-T introduced across the UK as part of the digital switchover. BBC Red Button BBC Red Button is a branding used for digital interactive television services provided by the BBC, and broadcast in the United Kingdom. The services replaced Ceefax, the BBC's analogue teletext service. The service was launched in September 1999
Teletext as the internet, whereby pages are 'requested' and then 'sent' to the user – a method not possible given the one-way nature of broadcast teletext. Unlike the Internet, teletext is broadcast, so it does not slow down further as the number of users increase, although the greater number of pages, the longer one is likely to wait for each to be found in the cycle. For this reason, some pages (e.g. common index pages) are broadcast more than once in each cycle. Teletext proved to be a reliable text news service during events such as the September 11 terrorist attacks,