Text For Banner or Text Banner is a setting commonly found on broadband router firmware. A “text banner” is a message a user can set that is displayed when someone logs in to the router. Text banners usually include a message to indicate that unauthorized access is prohibited.
See “Common Router Settings” in the Quick Reference section of Webopedia.
See also Webopedia’s “Did You Know… Routers, Switches and Hubs: What’s the Difference?“