I need to create a link to open one particular Hangouts chat (not videocall). It is possible to open a chat in a separate window from the main Google+ page, but the URL of that window (something like https://talkgadget.google.com/u/0/talkgadget/_/frame?v=1395695842&hl=ru#tgtn_c71vh1
) can't be opened again.
Is it possible to get a permanent URL?