Input (grade 12): The standard covers two TAE types: F ("Fernsprechgerät": for telephones) and N ("Nebengerät" or "Nichtfernsprechgerät": for other devices such as answering machines and modems).
Output (grade 10): The standard covers two TAE types: F ("Fernsprechgerät": for telephones) and N ("Nebengerät": for other devices such as answering machines and modems).