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Hi All..
We have shifted one BSC from one MSC to other & after that SD Drop rate of some cells has been increased to a large value.. wat can be the possible reasons???
it sounds like there is a misconfig in the MSC.
the SDCCH drop is caused by the expiry of a timer during the sdcch phase. The sdcch phase is a dialog between MS and MSC : authentication, ciphering, call setup, equipment check (= DTAP messages).
Timer expiry is normally caused by a radio failure, but in your case it might be due to a non-response from MSC or from MS.
Have you performed a A trace to detect when is the failure occuring ?
-Pix
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