* [[MicroLink Multi-Speed Modem]] ([[MicroLink]])
* [[Cirkit_Prestel_Link_Amstrad_Interface]] (acoustic coupler bundled with [[Cirkit serial interface]]) ([[Cirkit]])
* [[Schneider BTX Modul]] (for german German Bildschirmtext) ([[Schneider]])
* [[Loritel]] (for french Minitel) ([[Loriciel|Loriciels]])