Is the city bus p from chrompet to chengalpattu valid in outstation bus that pes Through the same route?

I want to know the details of bus p from chromepet to paranur / chengalpattu and whether this p will be valid in the outstation buses that pes through paranur / chengalpattu (for example: pondycherry busses p through paranur. Whether my pass will be valid if I get in to this bus till Paranur)