diff --git a/bsc/MSC_ConnectionHandler.ttcn b/bsc/MSC_ConnectionHandler.ttcn
index fc12307..af93343 100644
--- a/bsc/MSC_ConnectionHandler.ttcn
+++ b/bsc/MSC_ConnectionHandler.ttcn
@@ -187,11 +187,11 @@
 
 /* altstep for handling of IPACC media related commands. Activated by as_Media() to test
  * RSL level media handling */
-altstep as_Media_ipacc() runs on MSC_ConnHdlr {
+altstep as_Media_ipacc(RSL_DCHAN_PT rsl_pt := RSL, RSL_DCHAN_PT rsl_pt_ho_target := RSL1) runs on MSC_ConnHdlr {
 	var RSL_Message rsl;
 	var RSL_IE_Body ie;
 	var boolean b_unused;
-	[not g_media.bts.ipa_crcx_seen] RSL.receive(tr_RSL_IPA_CRCX(g_chan_nr)) -> value rsl {
+	[not g_media.bts.ipa_crcx_seen] rsl_pt.receive(tr_RSL_IPA_CRCX(g_chan_nr)) -> value rsl {
 		/* Extract parameters from request + use in response */
 		if (f_rsl_find_ie(rsl, RSL_IE_IPAC_RTP_PAYLOAD, ie)) {
 			g_media.bts.rtp_pt := ie.ipa_rtp_pt;
@@ -199,14 +199,14 @@
 		if (f_rsl_find_ie(rsl, RSL_IE_IPAC_RTP_PAYLOAD2, ie)) {
 			g_media.bts.rtp_pt := ie.ipa_rtp_pt2;
 		}
-		RSL.send(ts_RSL_IPA_CRCX_ACK(g_chan_nr, g_media.bts.conn_id,
+		rsl_pt.send(ts_RSL_IPA_CRCX_ACK(g_chan_nr, g_media.bts.conn_id,
 						f_inet_addr(g_media.bts.bts.host),
 						g_media.bts.bts.port_nr,
 						g_media.bts.rtp_pt));
 		g_media.bts.ipa_crcx_seen := true;
 		repeat;
 		}
-	[g_media.bts.ipa_crcx_seen] RSL.receive(tr_RSL_IPA_MDCX(g_chan_nr, ?)) -> value rsl{
+	[g_media.bts.ipa_crcx_seen] rsl_pt.receive(tr_RSL_IPA_MDCX(g_chan_nr, ?)) -> value rsl{
 		/* Extract conn_id, ip, port, rtp_pt2 from request + use in response */
 		b_unused := f_rsl_find_ie(rsl, RSL_IE_IPAC_CONN_ID, ie);
 		if (g_media.bts.conn_id != ie.ipa_conn_id) {
@@ -224,7 +224,7 @@
 		if (f_rsl_find_ie(rsl, RSL_IE_IPAC_RTP_PAYLOAD2, ie)) {
 			g_media.bts.rtp_pt := ie.ipa_rtp_pt2;
 		}
-		RSL.send(ts_RSL_IPA_MDCX_ACK(g_chan_nr, g_media.bts.conn_id,
+		rsl_pt.send(ts_RSL_IPA_MDCX_ACK(g_chan_nr, g_media.bts.conn_id,
 						f_inet_addr(g_media.bts.peer.host),
 						g_media.bts.peer.port_nr,
 						g_media.bts.rtp_pt));
@@ -233,7 +233,7 @@
 		}
 
 	/* on second (new) BTS during hand-over */
-	[not g_media.bts1.ipa_crcx_seen] RSL1.receive(tr_RSL_IPA_CRCX(g_chan_nr)) -> value rsl {
+	[not g_media.bts1.ipa_crcx_seen] rsl_pt_ho_target.receive(tr_RSL_IPA_CRCX(g_chan_nr)) -> value rsl {
 		/* Extract parameters from request + use in response */
 		if (f_rsl_find_ie(rsl, RSL_IE_IPAC_RTP_PAYLOAD, ie)) {
 			g_media.bts1.rtp_pt := ie.ipa_rtp_pt;
@@ -241,7 +241,7 @@
 		if (f_rsl_find_ie(rsl, RSL_IE_IPAC_RTP_PAYLOAD2, ie)) {
 			g_media.bts1.rtp_pt := ie.ipa_rtp_pt2;
 		}
-		RSL1.send(ts_RSL_IPA_CRCX_ACK(g_chan_nr, g_media.bts1.conn_id,
+		rsl_pt_ho_target.send(ts_RSL_IPA_CRCX_ACK(g_chan_nr, g_media.bts1.conn_id,
 						f_inet_addr(g_media.bts1.bts.host),
 						g_media.bts1.bts.port_nr,
 						g_media.bts1.rtp_pt));
@@ -249,7 +249,7 @@
 		repeat;
 		}
 	/* on second (new) BTS during hand-over */
-	[g_media.bts1.ipa_crcx_seen] RSL1.receive(tr_RSL_IPA_MDCX(g_chan_nr, ?)) -> value rsl{
+	[g_media.bts1.ipa_crcx_seen] rsl_pt_ho_target.receive(tr_RSL_IPA_MDCX(g_chan_nr, ?)) -> value rsl{
 		/* Extract conn_id, ip, port, rtp_pt2 from request + use in response */
 		b_unused := f_rsl_find_ie(rsl, RSL_IE_IPAC_CONN_ID, ie);
 		if (g_media.bts1.conn_id != ie.ipa_conn_id) {
@@ -267,7 +267,7 @@
 		if (f_rsl_find_ie(rsl, RSL_IE_IPAC_RTP_PAYLOAD2, ie)) {
 			g_media.bts1.rtp_pt := ie.ipa_rtp_pt2;
 		}
-		RSL1.send(ts_RSL_IPA_MDCX_ACK(g_chan_nr, g_media.bts1.conn_id,
+		rsl_pt_ho_target.send(ts_RSL_IPA_MDCX_ACK(g_chan_nr, g_media.bts1.conn_id,
 						f_inet_addr(g_media.bts1.peer.host),
 						g_media.bts1.peer.port_nr,
 						g_media.bts1.rtp_pt));
@@ -654,17 +654,17 @@
 }
 
 function f_rsl_send_l3(template PDU_ML3_MS_NW l3, template (omit) RslLinkId link_id := omit,
-			template (omit) RslChannelNr chan_nr := omit) runs on MSC_ConnHdlr {
+			template (omit) RslChannelNr chan_nr := omit, RSL_DCHAN_PT rsl_pt := RSL) runs on MSC_ConnHdlr {
 	if (not isvalue(link_id)) {
 		link_id := ts_RslLinkID_DCCH(0);
 	}
 	if (not isvalue(chan_nr)) {
 		chan_nr := g_chan_nr;
 	}
-	RSL.send(ts_RSL_DATA_IND(valueof(chan_nr), valueof(link_id), enc_PDU_ML3_MS_NW(valueof(l3))));
+	rsl_pt.send(ts_RSL_DATA_IND(valueof(chan_nr), valueof(link_id), enc_PDU_ML3_MS_NW(valueof(l3))));
 }
 
-function f_rsl_reply(template PDU_ML3_MS_NW l3, RSL_Message orig) runs on MSC_ConnHdlr {
+function f_rsl_reply(template PDU_ML3_MS_NW l3, RSL_Message orig, RSL_DCHAN_PT rsl_pt := RSL) runs on MSC_ConnHdlr {
 	var RslChannelNr chan_nr := orig.ies[0].body.chan_nr;
 	var RslLinkId link_id;
 	if (orig.msg_type == RSL_MT_ENCR_CMD) {
@@ -672,7 +672,7 @@
 	} else {
 		link_id := orig.ies[1].body.link_id;
 	}
-	f_rsl_send_l3(l3, link_id, chan_nr);
+	f_rsl_send_l3(l3, link_id, chan_nr, rsl_pt := rsl_pt);
 }
 
 /* Convert the cipher representation on BSSMAP to the representation used on RSL */
@@ -783,7 +783,8 @@
 	setverdict(pass);
 }
 
-function f_cipher_mode(TestHdlrEncrParams enc, boolean exp_fail := false)
+function f_cipher_mode(TestHdlrEncrParams enc, boolean exp_fail := false,
+                       RSL_DCHAN_PT rsl_pt := RSL, RSLEM_PROC_PT rsl_proc_pt := RSL_PROC)
 runs on MSC_ConnHdlr {
 	var PDU_BSSAP bssap;
 	var RSL_Message rsl;
@@ -796,14 +797,14 @@
 
 	alt {
 	/* RSL/UE Side */
-	[] RSL.receive(tr_RSL_ENCR_CMD(g_chan_nr)) -> value rsl {
+	[] rsl_pt.receive(tr_RSL_ENCR_CMD(g_chan_nr)) -> value rsl {
 		var PDU_ML3_NW_MS l3 := dec_PDU_ML3_NW_MS(rsl.ies[3].body.l3_info.payload);
 		log("Rx L3 from net: ", l3);
 
 		f_verify_encr_info(rsl);
 
 		if (ischosen(l3.msgs.rrm.cipheringModeCommand)) {
-			f_rsl_reply(ts_RRM_CiphModeCompl, rsl);
+			f_rsl_reply(ts_RRM_CiphModeCompl, rsl, rsl_pt := rsl_pt);
 		}
 		repeat;
 		}
@@ -956,9 +957,9 @@
 	return tsc;
 }
 
-altstep as_assignment(inout AssignmentState st) runs on MSC_ConnHdlr {
+altstep as_assignment(inout AssignmentState st, RSL_DCHAN_PT rsl_pt := RSL, RSLEM_PROC_PT rsl_proc_pt := RSL_PROC) runs on MSC_ConnHdlr {
 	var RSL_Message rsl;
-	[not st.rr_ass_cmpl_seen] RSL.receive(tr_RSL_DATA_REQ(g_chan_nr)) -> value rsl {
+	[not st.rr_ass_cmpl_seen] rsl_pt.receive(tr_RSL_DATA_REQ(g_chan_nr)) -> value rsl {
 		var PDU_ML3_NW_MS l3 := dec_PDU_ML3_NW_MS(rsl.ies[2].body.l3_info.payload);
 		log("Rx L3 from net: ", l3);
 		if (ischosen(l3.msgs.rrm.assignmentCommand)) {
@@ -979,20 +980,20 @@
 			/* FIXME: Determine TRX NR by ARFCN, instead of hard-coded TRX0! */
 
 			/* register our component for this channel number at the RSL Emulation */
-			f_rslem_register(0, new_chan_nr);
+			f_rslem_register(0, new_chan_nr, PT := rsl_proc_pt);
 			/* dispatch queued messages for this channel (if any) */
-			f_rslem_dchan_queue_dispatch();
+			f_rslem_dchan_queue_dispatch(PT := rsl_proc_pt);
 
 			var PDU_ML3_MS_NW l3_tx := valueof(ts_RRM_AssignmentComplete('00'O));
 			/* send assignment complete over the new channel */
-			RSL.send(ts_RSL_EST_IND(new_chan_nr, valueof(ts_RslLinkID_DCCH(0)),
+			rsl_pt.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;
 			g_chan_nr := new_chan_nr;
 			st.rr_ass_cmpl_seen := true;
 			/* obtain channel activation from RSL_Emulation for new channel */
-			var RSL_Message chan_act := f_rslem_get_last_act(RSL_PROC, 0, g_chan_nr);
+			var RSL_Message chan_act := f_rslem_get_last_act(rsl_proc_pt, 0, g_chan_nr);
 			/* check it (e.g. for correct ciphering parameters) */
 			f_check_chan_act(st, chan_act);
 			repeat;
@@ -1000,20 +1001,20 @@
 			Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("Unexpected L3 received", l3));
 		}
 		}
-	[st.rr_ass_cmpl_seen] RSL.receive(tr_RSL_DEACT_SACCH(st.old_chan_nr)) {
+	[st.rr_ass_cmpl_seen] rsl_pt.receive(tr_RSL_DEACT_SACCH(st.old_chan_nr)) {
 		st.old_lchan_deact_sacch_seen := true;
 		repeat;
 		}
-	[st.rr_ass_cmpl_seen] RSL.receive(tr_RSL_REL_REQ(st.old_chan_nr, tr_RslLinkID_DCCH(0))) {
+	[st.rr_ass_cmpl_seen] rsl_pt.receive(tr_RSL_REL_REQ(st.old_chan_nr, tr_RslLinkID_DCCH(0))) {
 		st.old_lchan_rll_rel_req_seen := true;
-		RSL.send(ts_RSL_REL_CONF(st.old_chan_nr, valueof(ts_RslLinkID_DCCH(0))));
+		rsl_pt.send(ts_RSL_REL_CONF(st.old_chan_nr, valueof(ts_RslLinkID_DCCH(0))));
 		repeat;
 		}
-	[st.rr_ass_cmpl_seen] RSL.receive(tr_RSL_RF_CHAN_REL(st.old_chan_nr)) {
-		RSL.send(ts_RSL_RF_CHAN_REL_ACK(st.old_chan_nr));
+	[st.rr_ass_cmpl_seen] rsl_pt.receive(tr_RSL_RF_CHAN_REL(st.old_chan_nr)) {
+		rsl_pt.send(ts_RSL_RF_CHAN_REL_ACK(st.old_chan_nr));
 		/* unregister for old channel number in RSL emulation */
 		/* FIXME: Determine TRX NR by ARFCN, instead of hard-coded TRX0! */
-		f_rslem_unregister(0, st.old_chan_nr);
+		f_rslem_unregister(0, st.old_chan_nr, PT := rsl_proc_pt);
 		st.assignment_done := true;
 		repeat;
 		}