ぎゃく方向 ほうこう通信 つうしん じゃなかったです
gyakuhōkōtsūshinrojanakattadesu

Noun
Desu Copula

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

1. Wasn't a reverse communication path.; Wasn't a reverse channel.

Past/Perfective
Negative
Polite
Casual Register
Computing