=== Modems ===
* [[Cirkit_Prestel_Link_Amstrad_Interface]] (acoustic coupler bundled with [[Cirkit serial interface]]) ([[Cirkit]])
* [[Commstar v21/23 modem]] ([[PACE]])
* [[Data Research CH301S modem]] (greek company)
* [[EPTA modem]] (sold by Greek mag ΕΠΤΑ)
* [[KDS Communicator 104]] (connects directly to expansion port) ([[KDS Electronics]])
* [[Loritel]] (for french Minitel) ([[Loriciel|Loriciels]])
* [[Mini-Max Modem|KDS Mini-Max Modem]] (connects via RS232 interface) ([[KDS Electronics]])
* [[MicroLink Dual-Speed Modem]] ([[MicroLink]]) [[File:Microlink.pdf|Mircolink Manual]] and [[File:Micronet.pdf|Micronet manual]], provided by ''Spookspring''
* [[MicroLink Multi-Speed Modem]] ([[MicroLink]])
* [[Cirkit_Prestel_Link_Amstrad_InterfaceNightingale_modem]] (acoustic coupler bundled with [[Cirkit serial interface]]) ([[CirkitPACE]])
* [[Schneider BTX Modul]] (for German Bildschirmtext) ([[Schneider]])
* [[Loritel]] (for french Minitel) ([[Loriciel|Loriciels]])
=== Serial Interfaces ===