共通 きょうつう せん信号 しんごう もうじゃありませんでした
kyōtsūsenshin gōmōjārimasendeshita

Noun
Desu Copula

The polite, past negative form of 共通線信号網

1. Was not a common line signaling system.; Was not a shared line signaling network.

Past/Perfective
Negative
Polite
Terminal Form
Computing