Regression

BTS_Tests_LAPDm.TC_sabm_dm (from Titan)

Failing for the past 1 build (Since #2577 )

"BTS_Tests.ttcn:727 : Tguard timeout"
      BTS_Tests_LAPDm.ttcn:1482 BTS_Tests_LAPDm control part
      BTS_Tests_LAPDm.ttcn:425 TC_sabm_dm testcase