Here lies a problem.
In Huawei Max TA is not similar to Ericsson due to the fact that in Ericsson a call will be disconnected if its TA > MAXTA. But in Huawei an on-going call will not be terminated. (Unless it is BSC32 with Reserved Parameter 5 = 65503).
To make calls drop due to Max TA in BSC6000, there is another parameter which I have not got the exact documentation.
BSC32 was the previous (old) version.