Playboy Mansion Doorbell Motto?

I have tried searching both here and in Google for the Latin ( or Latinesque?) motto that was supposedly adjacent to the doorbell on the Playboy Mansion, but no luck, so I’ll turn to the Millions.

I know the English version was If you don’t swing, don’t ring - but what was the (supposedly) Latin version? My rusty memory suggests Sic non oscillatorum, non tintinnabulum, but can anyone confirm/deny this translation?

Googled hefner doorbell latin, and got Si non oscillas, noli tintinnare – looks better to me.