diff --git a/bts/BTS_Tests.ttcn b/bts/BTS_Tests.ttcn
index 0ee3cd4..076476f 100644
--- a/bts/BTS_Tests.ttcn
+++ b/bts/BTS_Tests.ttcn
@@ -497,9 +497,9 @@
 	var RSL_Message rx := f_rsl_transceive_ret(tx, exp_rx, id, ignore_other);
 }
 
-function f_rsl_chan_act(RSL_IE_ChannelMode mode, boolean encr_enable := false, RSL_IE_List more_ies := {})
-runs on ConnHdlr {
-	var RSL_Message ch_act := valueof(ts_RSL_CHAN_ACT(g_chan_nr, mode));
+function f_rsl_chan_act(RSL_IE_ChannelMode mode, boolean encr_enable := false, RSL_IE_List more_ies := {},
+			RSL_IE_ActivationType act_type := t_RSL_IE_ActType_IA) runs on ConnHdlr {
+	var RSL_Message ch_act := valueof(ts_RSL_CHAN_ACT(g_chan_nr, mode, act_type));
 	if (encr_enable) {
 		/* append encryption related IEs, if requested */
 		var RSL_IE_EncryptionInfo encr_info;
@@ -1007,7 +1007,153 @@
 	Misc_Helpers.f_shutdown(__BFILE__, __LINE__);
 }
 
-/* TODO: Test for SACCH transmission rules in the context of special CHAN ACT (HO) */
+/* verify that SACCH DL transmission is started only if MS power IE present
+ * see section 4.1.3 of 3GPP TS 48.058 */
+private function f_TC_sacch_chan_act_ho_async(charstring id) runs on ConnHdlr {
+	var octetstring si5 := f_rnd_octstring(19);
+
+	f_l1_tune(L1CTL);
+	RSL.clear;
+
+	/* Step 1: Activate ASYNC HO channel without MS power IE */
+
+	/* Activate channel on BTS side */
+	f_rsl_chan_act(g_pars.chan_mode, act_type := t_RSL_IE_ActType_HO_ASYNC);
+	/* don't perform immediate assignment here, as we're testing non-IA case */
+	/* enable dedicated mode */
+	f_L1CTL_DM_EST_REQ(L1CTL, {false, mp_trx0_arfcn }, g_pars.chan_nr, 7);
+
+	/* Verify that no DL SACCH is being received */
+	f_sacch_missing(?);
+
+	f_rsl_chan_deact();
+	f_L1CTL_DM_REL_REQ(L1CTL, g_chan_nr);
+
+
+	/* Step 2: Activate ASYNC HO channel with MS power IE */
+
+	/* Activate channel on BTS side */
+	var RSL_IE_List addl_ies := {
+		valueof(t_RSL_IE(RSL_IE_MS_POWER, RSL_IE_Body:{ms_power := ts_RSL_IE_MS_Power(0)}))
+		};
+	f_rsl_chan_act(g_pars.chan_mode, more_ies := addl_ies, act_type := t_RSL_IE_ActType_HO_ASYNC);
+	/* don't perform immediate assignment here, as we're testing non-IA case */
+	/* enable dedicated mode */
+	f_L1CTL_DM_EST_REQ(L1CTL, {false, mp_trx0_arfcn }, g_pars.chan_nr, 7);
+
+	/* Verify that DL SACCH is being received */
+	f_sacch_present(si5);
+
+	f_rsl_chan_deact();
+	f_L1CTL_DM_REL_REQ(L1CTL, g_chan_nr);
+}
+testcase TC_sacch_chan_act_ho_async() runs on test_CT {
+	var ConnHdlr vc_conn;
+	var ConnHdlrPars pars;
+	f_init();
+
+	for (var integer i := 0; i < sizeof(g_AllChannels); i := i+1) {
+		pars := valueof(t_Pars(g_AllChannels[i], ts_RSL_ChanMode_SIGN));
+		log(testcasename(), ": Starting for ", g_AllChannels[i]);
+		vc_conn := f_start_handler(refers(f_TC_sacch_chan_act_ho_async), pars);
+		vc_conn.done;
+	}
+	/* TODO: do the above in parallel, rather than sequentially? */
+	Misc_Helpers.f_shutdown(__BFILE__, __LINE__);
+}
+
+/* verify that SACCH DL transmission is started only if TA + MS power IEs present,
+ * see section 4.1.4 of 3GPP TS 48.058 */
+private function f_TC_sacch_chan_act_ho_sync(charstring id) runs on ConnHdlr {
+	var octetstring si5 := f_rnd_octstring(19);
+	var RSL_IE_List addl_ies;
+
+	f_l1_tune(L1CTL);
+	RSL.clear;
+
+	/* Step 1: Activate SYNC HO channel without MS power IE */
+
+	/* Activate channel on BTS side */
+	f_rsl_chan_act(g_pars.chan_mode, act_type := t_RSL_IE_ActType_HO_SYNC);
+	/* don't perform immediate assignment here, as we're testing non-IA case */
+	/* enable dedicated mode */
+	f_L1CTL_DM_EST_REQ(L1CTL, {false, mp_trx0_arfcn }, g_pars.chan_nr, 7);
+
+	/* Verify that no DL SACCH is being received */
+	f_sacch_missing(?);
+
+	f_rsl_chan_deact();
+	f_L1CTL_DM_REL_REQ(L1CTL, g_chan_nr);
+
+
+	/* Step 2a: Activate SYNC HO channel with only MS power IE */
+
+	/* Activate channel on BTS side */
+	addl_ies := {
+		valueof(t_RSL_IE(RSL_IE_MS_POWER, RSL_IE_Body:{ms_power := ts_RSL_IE_MS_Power(0)}))
+		};
+	f_rsl_chan_act(g_pars.chan_mode, more_ies := addl_ies, act_type := t_RSL_IE_ActType_HO_SYNC);
+	/* don't perform immediate assignment here, as we're testing non-IA case */
+	/* enable dedicated mode */
+	f_L1CTL_DM_EST_REQ(L1CTL, {false, mp_trx0_arfcn }, g_pars.chan_nr, 7);
+
+	/* Verify that no DL SACCH is being received */
+	f_sacch_missing(?);
+
+	f_rsl_chan_deact();
+	f_L1CTL_DM_REL_REQ(L1CTL, g_chan_nr);
+
+
+	/* Step 2b: Activate SYNC HO channel with TA IE */
+
+	/* Activate channel on BTS side */
+	addl_ies := {
+		valueof(t_RSL_IE(RSL_IE_TIMING_ADVANCE, RSL_IE_Body:{timing_adv := 0}))
+		};
+	f_rsl_chan_act(g_pars.chan_mode, more_ies := addl_ies, act_type := t_RSL_IE_ActType_HO_SYNC);
+	/* don't perform immediate assignment here, as we're testing non-IA case */
+	/* enable dedicated mode */
+	f_L1CTL_DM_EST_REQ(L1CTL, {false, mp_trx0_arfcn }, g_pars.chan_nr, 7);
+
+	/* Verify that no DL SACCH is being received */
+	f_sacch_missing(?);
+
+	f_rsl_chan_deact();
+	f_L1CTL_DM_REL_REQ(L1CTL, g_chan_nr);
+
+
+	/* Step 3: Activate SYNC HO channel with MS power IE and TA IE */
+
+	/* Activate channel on BTS side */
+	addl_ies := {
+		valueof(t_RSL_IE(RSL_IE_TIMING_ADVANCE, RSL_IE_Body:{timing_adv := 0})),
+		valueof(t_RSL_IE(RSL_IE_MS_POWER, RSL_IE_Body:{ms_power := ts_RSL_IE_MS_Power(0)}))
+		};
+	f_rsl_chan_act(g_pars.chan_mode, more_ies := addl_ies, act_type := t_RSL_IE_ActType_HO_SYNC);
+	/* don't perform immediate assignment here, as we're testing non-IA case */
+	/* enable dedicated mode */
+	f_L1CTL_DM_EST_REQ(L1CTL, {false, mp_trx0_arfcn }, g_pars.chan_nr, 7);
+
+	/* Verify that DL SACCH is being received */
+	f_sacch_present(si5);
+
+	f_rsl_chan_deact();
+	f_L1CTL_DM_REL_REQ(L1CTL, g_chan_nr);
+}
+testcase TC_sacch_chan_act_ho_sync() runs on test_CT {
+	var ConnHdlr vc_conn;
+	var ConnHdlrPars pars;
+	f_init();
+
+	for (var integer i := 0; i < sizeof(g_AllChannels); i := i+1) {
+		pars := valueof(t_Pars(g_AllChannels[i], ts_RSL_ChanMode_SIGN));
+		log(testcasename(), ": Starting for ", g_AllChannels[i]);
+		vc_conn := f_start_handler(refers(f_TC_sacch_chan_act_ho_sync), pars);
+		vc_conn.done;
+	}
+	/* TODO: do the above in parallel, rather than sequentially? */
+	Misc_Helpers.f_shutdown(__BFILE__, __LINE__);
+}
 
 
 /***********************************************************************
@@ -4465,6 +4611,8 @@
 	execute( TC_sacch_multi() );
 	execute( TC_sacch_multi_chg() );
 	execute( TC_sacch_chan_act() );
+	execute( TC_sacch_chan_act_ho_async() );
+	execute( TC_sacch_chan_act_ho_sync() );
 	execute( TC_rach_content() );
 	execute( TC_rach_count() );
 	execute( TC_rach_max_ta() );