Now there is another interesting problem that i am facing.
T3101 expiry is increased after swap from Siemens to NSN BTSs.
The UL sensitivities are same for both BTSs. And increasing RxLevAccessMin does not help to decrease T3101 expiry.
Our network is Nokia BSC and Ericsson MSC. We have problem on USSD timer as after 40s USSD session is stopped and we have to setup again new session.
How to increase USSD Timer session ( increasing SDCCH time for USSD??)