diff --git a/bts/BTS_Tests.ttcn b/bts/BTS_Tests.ttcn
index 38490a0..61c40d4 100644
--- a/bts/BTS_Tests.ttcn
+++ b/bts/BTS_Tests.ttcn
@@ -40,6 +40,7 @@
 import from Osmocom_CTRL_Functions all;
 
 import from RSL_Types all;
+import from RTP_Types all;
 import from IPA_Types all;
 import from IPA_Emulation all;
 import from IPA_Testing all;
@@ -7592,6 +7593,104 @@
 	vc_conn.done;
 }
 
+/* Verify handling of Downlink and Uplink speech frames */
+private function f_TC_speech_rtp(charstring id) runs on ConnHdlr {
+	var L1ctlDlMessage l1_dl;
+	var PDU_RTP rtp_pdu;
+	var octetstring pl;
+	timer Td, Tu;
+
+	f_l1_tune(L1CTL);
+	f_est_dchan();
+
+	/* Activate the RTP emulation */
+	pl := f_rnd_octstring(6);
+	f_rtpem_activate(pl);
+
+	/* Give the scheduler some time to fill up the buffers */
+	f_sleep(2.0);
+	L1CTL.clear;
+	RSL.clear;
+
+	/* Make sure that Downlink frames are received at the UE */
+	Td.start(2.0);
+	alt {
+	[] L1CTL.receive(tr_L1CTL_TRAFFIC_IND(g_chan_nr, frame := pl)) -> value l1_dl {
+		log("TCH received: ", l1_dl.payload.traffic_ind.data);
+		L1CTL.send(ts_L1CTL_TRAFFIC_REQ(g_chan_nr, l1_dl.dl_info.link_id,
+			   l1_dl.payload.traffic_ind.data));
+		setverdict(pass);
+		}
+	[] L1CTL.receive(tr_L1CTL_TRAFFIC_IND(g_chan_nr, frame := ?)) -> value l1_dl {
+		setverdict(fail, "Rx unexpected Downlink speech frame ",
+			   "(", l1_dl.payload.traffic_ind.data, ") ",
+			   "expected (", pl, ")");
+		Misc_Helpers.f_shutdown(__BFILE__, __LINE__);
+		}
+	[] as_l1_sacch();
+	[] L1CTL.receive { repeat; }
+	[] Td.timeout {
+		setverdict(fail, "Timeout waiting for Downlink speech frames");
+		Misc_Helpers.f_shutdown(__BFILE__, __LINE__);
+		}
+	}
+
+	/* Make sure that Uplink frames are received at the BTS */
+	RTPEM_DATA.clear;
+	Tu.start(2.0);
+	alt {
+	[] RTPEM_DATA.receive(PDU_RTP:?) -> value rtp_pdu {
+		if (rtp_pdu.data != pl)
+			{ repeat; }
+		}
+	[] RTPEM_DATA.receive { repeat; }
+	[] Tu.timeout {
+		setverdict(fail, "Timeout waiting for Uplink speech frames");
+		Misc_Helpers.f_shutdown(__BFILE__, __LINE__);
+		}
+	}
+
+	f_rtpem_mode(RTPEM_CTRL, RTPEM_MODE_NONE);
+	f_L1CTL_DM_REL_REQ(L1CTL, g_chan_nr);
+	f_rsl_chan_deact();
+	f_rslem_unregister(0, g_chan_nr);
+}
+testcase TC_speech_rtp_tchf() runs on test_CT {
+	var ConnHdlr vc_conn;
+	var ConnHdlrPars pars;
+
+	f_init();
+
+	/* TS1, TCH/F, V1 (FR codec) */
+	pars := valueof(t_Pars(ts_RslChanNr_Bm(1), ts_RSL_ChanMode(RSL_CHRT_TCH_F, RSL_CMOD_SP_GSM1)));
+	vc_conn := f_start_handler(refers(f_TC_speech_rtp), pars);
+	vc_conn.done;
+
+	/* TS1, TCH/F, V2 (EFR codec) */
+	pars := valueof(t_Pars(ts_RslChanNr_Bm(1), ts_RSL_ChanMode(RSL_CHRT_TCH_F, RSL_CMOD_SP_GSM2)));
+	vc_conn := f_start_handler(refers(f_TC_speech_rtp), pars);
+	vc_conn.done;
+
+	/* TODO: also test V3 (AMR codec) */
+
+	Misc_Helpers.f_shutdown(__BFILE__, __LINE__);
+}
+testcase TC_speech_rtp_tchh() runs on test_CT {
+	var ConnHdlr vc_conn;
+	var ConnHdlrPars pars;
+
+	f_init();
+
+	/* TS5, TCH/H0, V1 (HR codec) */
+	pars := valueof(t_Pars(ts_RslChanNr_Lm(5, 0), ts_RSL_ChanMode(RSL_CHRT_TCH_H, RSL_CMOD_SP_GSM1)));
+	vc_conn := f_start_handler(refers(f_TC_speech_rtp), pars);
+	vc_conn.done;
+
+	/* TODO: also test V3 (AMR codec) */
+
+	Misc_Helpers.f_shutdown(__BFILE__, __LINE__);
+}
+
 /* test generation of RLL ERR IND based on Um errors (TS 48.058 3.9) */
 /*	protocol error as per 44.006 */
 /*	link layer failure (repetition of I-frame N200 times without ACK */
@@ -7788,6 +7887,8 @@
 
 	execute( TC_speech_no_rtp_tchf() );
 	execute( TC_speech_no_rtp_tchh() );
+	execute( TC_speech_rtp_tchf() );
+	execute( TC_speech_rtp_tchh() );
 }