びい-ISDN あいえすでぃうえぬではありませんでした
bii-a ie sudiuenudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of B-ISDN

1. Was not BISDN.; It was not BISDN.

Past/Perfective
Negative
Polite
Formal Register
Telecommunications