ぜん じゅう通信 つうしんではありませんでした
zen nijū tsūshindewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 全二重通信

1. It was not bi-directional communication.; It was not full-duplex communication.

Past/Perfective
Negative
Polite
Formal Register
Computing