An Italian correspondent has cleared up my questions about this film. According to him, Jacqueline was shown the script by Enrico Roseo, the producer of "Rossini, Rossini", who also was the writer and director of this film, but she didn't take the part. It is listed in Jacqueline's filmography in Halliwell's Filmgoer's and Video Viewer's Companion, but that is a mistake (it lists the year as 1992 and misspells "Telefono").
According to the IMDb, the cast
includes Anna Falchi, Sylvia Koscina, and Joanna Pacula,
but not Jacqueline.