侵入 しんにゅう検知 けんちシステムじゃなかったです
shinnyūkenchishisutemujanakattadesu

Noun
Desu Copula

The polite, past negative form of 侵入検知システム

1. Wasn't an intrusion detection system.

Past/Perfective
Negative
Polite
Casual Register
Computing