Thanks Erwin for the reply,
let me make another comment on this issue,
this kind of problem happens on Nokia BTSs, although huawei and motorola bts don’t suffer from the same issue,
whenever Transmission quality reaches good level, bts should initialize itself automatically and stand-up
everytime loop-unloop solution take times in big networks.
i suppose that problem is Transmission card which is located in BTS.
Tomorrow i am going to ask my colleague who they had used nokia bts long time about how they overcome this problem.
if i got useful info, i would share it with you.