Years went by, and chat line services evolved. Nowadays chat line services are 80% used for simple chat, 10% for depression therapy, and 10% for language exchange.
In France chat lines were used in WWII as a method of communication between soldiers and their families. The first official chat line was released .in 1973 by David R. Woolley. But in the field of war this type of communication was called “talkee”, it’s a term soldiers where using for what later was going to be called chat line.
Here’s a video of what a chat line is nowadays.