Hi,
the call with trans_type 5 is the 3rd record of a call which experienced anti-trunk-tromboning.
Don't know your setup, but this is what we had:
1) incoming call on TrkGrp 1
App 1, CCT1: Transfer to IVR on TrkGrp2
CDR: disposition=6, trans_type=1, app=1
2) incoming call from IVR on TrkGrp2...