It was probably a Videx Videoterm: https://archive.org/details/Videx_Videoterm_Installation_and_Operation_Manual https://archive.org/details/Videx_Videoterm_In

It was probably a Videx Videoterm: https://archive.org/details/Videx_Videoterm_Installation_and_Operation_Manual https://archive.org/details/Videx_Videoterm_Installation_and... It was common for Apple resellers at the time to sell them with third-party add-ons.