高速 こうそく通信 つうしん もうじゃありませんでした
kōsokutsūshimmōja arimasendeshita

Noun
Desu Copula

The polite, past negative form of 高速通信網

1. Was not a high-speed communication network.; It wasn't a high-speed communication network.

Past/Perfective
Negative
Polite
Terminal Form
Computing