hi,
i face the same problem in my network, not only one BSC, but the whole network, high SDCCH drop due to others, CNDROP is very high due to others.
CLUNDROP is high and sometimes CNDROPSMS suddenly goes up sharply for some cells for days, then goes back to normal performance with no action, all cells are not in LA border, i had tried all the solutions done by Sam, we have only 2G network, so no ping pong between 2G and 3G.
any suggestions?