d-link dmc-805g media converter :Problem FO is down

[Dhikra Marghli]

Hello ,

i have two    d-link dmc-805g media converter  and each one include module : 

 module D-link DEM-310GT 1000BASE-LX sm/1310nm 

so problem the two fibre are down and not are up !

so i need to know what's exact the problem ?? problem module or jarrtier !!  we have LC LC 

[Dhikra Marghli]

I wait a reply 

thanks in adv