Facing frequent LAN disconnections on airtel fiber

There might be some issues with the lan cable or the router itself so please get them checked before jumping into any conclusions
 
I think cable is probably fine, it's the cheap connectors inside the jack.

@cyruff845 Check your connectors on both ends for black thin coating or rust (that's rust too, isn't?) or post a picture here
 
@wheatbread @Xposed He said it was an olt issue and he fixed it but it still persists .The PON light which is supposed to be stable suddenly starts blinking and i lose connection . i don't know what is causing this?
 


I've been facing a weird issue with my Airtel Xstream Fibre connection .The PON light which is supposed to be stable suddenly starts blinking and the connection goes off .It usually happens 7-8 times a day
 

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