Definition - What does CoolTalk mean?
CoolTalk was an Internet telephony utility in the form of a plug-in for Netscape Navigator 3.0. Launched in 1996, CoolTalk included an answering machine and a shared white board.
Techopedia explains CoolTalk
CoolTalk was among the first voice over Internet Protocol (VoIP) software products. Meant to be widely used among Internet users, CoolTalk was designed to run on cross-platform operating systems. Thanks to CoolTalk, statistics about VoIP users became available, contributing to the advancement of later VoIP software products.