Hi Pix, Thanks for your reply.
We have monitored the A interface but nothing there. No cause codes in the MSC either. The MSC does not notice anything difference than before. We have noticed also a huge increase in T200 timeouts. My theory is that the TMSI allocation procedure increases the SDCCH MHT and in areas with low SS the chance is therefore higher that an SDCCH drop (due to low SS) will occur. Any suggestions on what we can do to bring down the SDCCH drops? Could we increase the T200 timer for example?