高速 こうそく通信 つうしん もうではありませんでした
kōsokutsūshimmo udewa arimasendeshita

Noun
Desu Copula

The polite, past negative form of 高速通信網

1. Was not a high-speed communication network.; It was not a high-speed network.

Past/Perfective
Negative
Polite
Formal Register
Computing