What are the good values for these to have a stable connectionTell to him that you will pay a lot less than as the current plan includes UL also ( He is lying on your face , BSNL advertises symmetric speeds, my LCO used the same to lure me )
Basically your LCO is situated either far away or has lots of wiring problem like fiber bends,etc which leads weakens your TX power to the extent it can't reach OLT without significant attenuation
Check your Rx/TX power and stand a firm ground that you want UL
Also how many core your cable has?