WAP-7 - दिल तुझपे कुर्बान

what is the meaning of this FSP sign ???
i asked some loco pilots about these signs but even they didn't know about FSP signs
these white boards are present between distant signal and home signal on both side of station.
and present on both LQ and MACLs equipped stations
this...
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one is before NRW Station in between distant signal and home signal.
i haven't seen these signs anywhere else except ROK-JHL-BTI section.
this one was freshly painted thats why FSP is not written on it.all other similar boards are written F.S.P on them vertically
if anyone knows....... please share.......please.....