Hi Navin
1)100% setup is good that means ur BTS and BSC are working fine now you have to check the congestion in the “A interface” this is not reflected in your performance I guess.So please check the this out.
2)TCH and SD blockings is measured only on “Abis Interface”.
3)Though you get a SD u may not get a TCH from the MSC. So please do check this out
Regards
Prabhu