1. Log into operator panel and navigate to “Awaiting visitors” page.
    Mibew Messenger 3.6.0 (with several official plugins) (username: admin, password is empty)
  2. Start a chat

Alternatively you can start a chat by sending invitation from operator panel and accepting that invitation as a visitor on this page.

Also you can start a chat with the specific operator using the form below (use code 1 for admin):