dears, which you could help me in the below case as iam spending 5 days without any progress
the case that we are try to integrate new BTS3900A site but the site is always down “OML blocked” although the E1 is normal and have no bit error rate and IUB led is off , the NOC cant see the site “no management” we have tried the below and nothing happened
2)replace E1 Cable
3)replace the BBU
4)replace the interface board of the BSC
5)using another GTMU from already integrated site
6)remove the site creation and recreate again
you have done almost everything, do one last thing and change the E1 of the site with a live site during night time, this will ascertain if there is some problem in the media or not.