Swissphone Quattrino 429

[Boenke]

Hi, does anyone knows if an analogue pager, like Swissphone Quattrino, can be used with discriminator exit? I installed the correct frequency cristal and connected a 3,5 audio jack on the speaker connections. Pdw is listening but al received messages are poor quality and unreadable. Maybe there is an unfiltered audio pin on these pagers? Thanks