@deanot26508 Sorry for qoute, it wasn't mean to hurt you.
But you bios regarding statement was understood thats why I couldn't apply that in Pi.
pbx server was previously working, but with the error of "tampered files", for that I followed their link and ended with commands as
"amportal chown
amportal a ma refreshsignatures
amportal reset"
but "amportal a ma refreshsignatures" was not working earlier, later I made that workable after time setting (as you suggested) but I couldn't approach the Pbx server.
Pi IP is known to me.