じゅん方向 ほうこう通信 つうしん じゃなかったです
junhōkōtsūshinrojanakattadesu

Noun
Desu Copula

The polite, past negative form of 順方向通信路

1. Wasn't a forward communication path.; Wasn't a one-way communication channel.

Past/Perfective
Negative
Polite
Casual Register
Computing