IEC 60417-5989 Pr: Telephone line

IEC 60417: Eight graphical symbols for use on telephone and telecommunication equipment

IEC 60417-5999 Pr: Telephone, ringing

Digital cellular telecommunications system (Phase 2+) - General requirements on interworking between the Public Land Mobile Network (PLMN) and the Integrated Services Digital Network (ISDN) or Public Switched Telephone Network (PSTN) (Endorsement of the English version ETS 300 976 V 5.2.2 (1997-05) as a German standard) (Endorsement of the English version ETS 300 976 V 5.3.1 (1997-09) as a German standard) (Endorsement of the English version ETS 300 976 V 5.4.1 (1998-01) as a German standard) (Endorsement of the English version ETS 300 976 V 5.5.1 (1998-03) as a German standard) (Endorsement of the English version ETS 300 976 V 5.6.1 (1998-07) as a German standard) (Endorsement of the English version ETS 300 976 V 5.7.1 (1998-10) as a German standard) (Endorsement of the English version ETS 300 976 V 5.8.1 (1999-03) as a German standard) (Endorsement of the English version ETS 300 976 V 5.9.1 (1999-08) as a German standard) (Endorsement of the English version ETS 300 976 V 5.10.1 (2000-06) as a German standard)