WIP: msc: First test case for mobile terminated call testing

We start the call from the MNCC side, match on the paging and then
pick it up from there.

It currently fails as the MNCC_Emulation cannot yet handle "ConnHdlr
originated" MNCC calls yet.

Change-Id: I28c465187fd8b1dcfd687180b373a47bb9ac6734
diff --git a/msc_tests/BSC_ConnectionHandler.ttcn b/msc_tests/BSC_ConnectionHandler.ttcn
index 75871c5..bc6eebc 100644
--- a/msc_tests/BSC_ConnectionHandler.ttcn
+++ b/msc_tests/BSC_ConnectionHandler.ttcn
@@ -132,6 +132,19 @@
 	}
 }
 
+/* helper function to fully establish a dedicated channel */
+function f_establish_fully_pag(MobileIdentityLV mi, boolean expect_auth, boolean expect_ciph)
+runs on BSC_ConnHdlr {
+	var PDU_ML3_MS_NW l3_info := valueof(ts_PAG_RESP(mi));
+	var PDU_DTAP_MT dtap_mt;
+
+	/* Send BSSAP_Conn_Req with COMPL L3 INFO to MSC */
+	f_bssap_compl_l3(l3_info);
+
+	f_mm_common(expect_auth, expect_ciph);
+}
+
+
 /* build a PDU_ML3_MS_NW containing a Location Update by IMSI */
 function f_build_lu_imsi(hexstring imsi) return PDU_ML3_MS_NW
 {