What does I.420 stand for?

Find what does I.420 stand for and its field of usage? I.420 is used in the following field.

All the possible full forms of I.420 are provided below with meaning and definition. User can also visit each expanded form to read detailed definition of I.420 and its example usage.

I.420 » ITU ISDN Interface Standard Military - Advertisement: More full forms :
IA IAB IAC IACS IADB IADC IADGES IADS IADT IAE IAEM IAFP IAFU IAFV IAG IAL IAM What is the full form of I.420 ? I.420 can be expanded as ITU ISDN Interface StandardWhat does I.420 mean? Meaning of I.420 is ITU ISDN Interface Standard