加入 かにゅう しゃ せん交換 こうかん じゃなかったです
ka nyūshasenkōkankijanakattadesu

Noun
Desu Copula

The polite, past negative form of 加入者線交換機

1. Was not a joiner line switch.; Wasn't a member line exchange.

Past/Perfective
Negative
Polite
Casual Register
Computing