Defect Detector PL tones-Question for maintainers

Is there a standard PL used for the wayside dectors to report back to the Railroad Spectra/Astro Spectra for display purposes?

I have noticed on the Southern Tier CR (or perhaps NS on the takeover) seems to use 100.0 on a good report. Due to lack of traffic and not being around when maintainers are around, I do not know what PL (if any) would be used on a defect activation.

Thanks