 
 <prompt> Wetin be di name of one book wey dem publish for 1949 wey dey talk about dystopia for di future? Based on di question wey dey top, write one context wey get di answer. E fit be 1 - 20 sentences. Context: <response>: ```Na for di 1980s e be like say digital telephony transmission networks start dey possible, like ISDN networks wey dey assure minimum bit rate (usually 128 kilobits/s) for compressed video and audio transmission. During dis time, research dey go on for other forms of digital video and audio communication. Many of these technologies, like the Media space, no dey too popular like videoconferencing but dem still dey important for research. Di first systems wey dey dedicated start to show for market as ISDN networks dey expand for di whole world. One of di first commercial videoconferencing systems wey dem sell to companies na from PictureTel Corp., wey do Initial Public Offering for November, 1984.``` 