高速 こうそく通信 つうしん もうじゃなかったです
kōsokutsūshimmōja nakattadesu

Noun
Desu Copula

The polite, past negative form of 高速通信網

1. Wasn't a high-speed communication network.; Wasn't a fast network.

Past/Perfective
Negative
Polite
Casual Register
Computing