Some Japanese Words on a Fax Machine

I would never buy from a company that would make statements like that!

It's probably supposed to say:

ジュシンセッテイ
セッテイモード
オンフック

Notice the slight differences. Your version said:

jujin yattei
yattei moodo
onhukku

Mine says:

jushin settei
settei moodo
onhukku

The key characters are ジ (ji) vs. シ (shi) and ャ (ya) vs. セ (se).

Or in regular Japanese:

受信設定
設定モード
オンフック

Translated, it means:

Reception settings
Settings mode
On hook

Thank you very much.