bsc: fix as_handover(): first RSL should be EST IND, not DATA

Change-Id: I41b395eb7dbdd56796706722d79c7a3bc5a0b5b0
diff --git a/bsc/MSC_ConnectionHandler.ttcn b/bsc/MSC_ConnectionHandler.ttcn
index 022cc63..589ccf1 100644
--- a/bsc/MSC_ConnectionHandler.ttcn
+++ b/bsc/MSC_ConnectionHandler.ttcn
@@ -998,7 +998,7 @@
 
 			/* send handover complete over the new channel */
 			var PDU_ML3_MS_NW l3_tx := valueof(ts_RRM_HandoverComplete('00'O));
-			RSL1.send(ts_RSL_DATA_IND(new_chan_nr, valueof(ts_RslLinkID_DCCH(0)),
+			RSL1.send(ts_RSL_EST_IND(new_chan_nr, valueof(ts_RslLinkID_DCCH(0)),
 						  enc_PDU_ML3_MS_NW(l3_tx)));
 			/* by default, send via the new channel from now */
 			st.old_chan_nr := g_chan_nr;