Regression

BTS_Tests_LAPDm.TC_sabm_dm (from Titan)

Failing for the past 1 build (Since #2271 )

"VTY Timeout for prompt: enable"
      BTS_Tests_LAPDm.ttcn:1482 BTS_Tests_LAPDm control part
      BTS_Tests_LAPDm.ttcn:425 TC_sabm_dm testcase