 
 <prompt> "The part of the drill wey dey do the drilling na wetin dem dey call am? Based on the question wey dey before this one, write small tori wey get the 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, dem dey research 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 around di 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. 