diff --git a/bts/BTS_Tests.ttcn b/bts/BTS_Tests.ttcn
index 5b69b5df5..0ee3cd4b7 100644
--- a/bts/BTS_Tests.ttcn
+++ b/bts/BTS_Tests.ttcn
@@ -497,7 +497,7 @@ runs on ConnHdlr {
 	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)
+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));
 	if (encr_enable) {
@@ -507,6 +507,7 @@ runs on ConnHdlr {
 		ch_act.ies := ch_act.ies & { valueof(t_RSL_IE(RSL_IE_ENCR_INFO, RSL_IE_Body:{encr_info :=
 encr_info})) };
 	}
+	ch_act.ies := ch_act.ies & more_ies;
 	f_rsl_transceive(ch_act, tr_RSL_CHAN_ACT_ACK(g_chan_nr), "RSL CHAN ACT");
 }
 
@@ -960,7 +961,52 @@ testcase TC_sacch_multi_chg() runs on test_CT {
 	Misc_Helpers.f_shutdown(__BFILE__, __LINE__);
 }
 
-/* TODO: Test for SACCH information present in RSL CHAN ACT (overrides FILLING) */
+/* Test for SACCH information present in RSL CHAN ACT (overrides FILLING) */
+private function f_TC_sacch_chan_act(charstring id) runs on ConnHdlr {
+	var octetstring si5 := f_rnd_octstring(19);
+	var octetstring si6 := f_rnd_octstring(19);
+	var octetstring si5_specific := f_rnd_octstring(19);
+	var octetstring si6_specific := f_rnd_octstring(19);
+
+	/* First, configure both SI5 and SI6 to be transmitted */
+	RSL.send(ts_RSL_SACCH_FILL(RSL_SYSTEM_INFO_5, si5));
+	RSL.send(ts_RSL_SACCH_FILL(RSL_SYSTEM_INFO_6, si6));
+
+	f_l1_tune(L1CTL);
+	RSL.clear;
+
+	/* activate channel with different SACCH filling */
+	var RSL_SacchInfo sacch_info := valueof(ts_RSL_SacchInfo({
+				ts_RSL_SacchInfoElem(RSL_SYSTEM_INFO_5, si5_specific),
+				ts_RSL_SacchInfoElem(RSL_SYSTEM_INFO_6, si6_specific)
+				}));
+	var RSL_IE_List addl_ies := { valueof(t_RSL_IE(RSL_IE_SACCH_INFO,
+							RSL_IE_Body:{sacch_info := sacch_info})) };
+	f_est_dchan(more_ies := addl_ies);
+
+	/* check that SACCH actually are received as expected */
+	f_sacch_present(si5_specific);
+	f_sacch_present(si6_specific);
+
+	/* release the channel */
+	f_rsl_chan_deact();
+	f_L1CTL_DM_REL_REQ(L1CTL, g_chan_nr);
+}
+testcase TC_sacch_chan_act() 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), pars);
+		vc_conn.done;
+	}
+	/* TODO: do the above in parallel, rather than sequentially? */
+	Misc_Helpers.f_shutdown(__BFILE__, __LINE__);
+}
+
 /* TODO: Test for SACCH transmission rules in the context of special CHAN ACT (HO) */
 
 
@@ -1386,7 +1432,7 @@ private function f_rach_req_wait_chan_rqd(integer ra) runs on ConnHdlr return Gs
 }
 
 /* Establish dedicated channel: L1CTL + RSL side */
-private function f_est_dchan(boolean encr_enable := false) runs on ConnHdlr {
+private function f_est_dchan(boolean encr_enable := false, RSL_IE_List more_ies := {}) runs on ConnHdlr {
 	var GsmFrameNumber fn;
 	var ImmediateAssignment imm_ass;
 	var integer ra := 23;
@@ -1395,7 +1441,7 @@ private function f_est_dchan(boolean encr_enable := false) runs on ConnHdlr {
 	fn := f_rach_req_wait_chan_rqd(ra);
 
 	/* Activate channel on BTS side */
-	f_rsl_chan_act(g_pars.chan_mode, encr_enable);
+	f_rsl_chan_act(g_pars.chan_mode, encr_enable, more_ies);
 
 	/* Send IMM.ASS via CCHAN */
 	var ChannelDescription ch_desc := {
@@ -4418,6 +4464,7 @@ control {
 	execute( TC_sacch_info_mod() );
 	execute( TC_sacch_multi() );
 	execute( TC_sacch_multi_chg() );
+	execute( TC_sacch_chan_act() );
 	execute( TC_rach_content() );
 	execute( TC_rach_count() );
 	execute( TC_rach_max_ta() );
diff --git a/library/RSL_Types.ttcn b/library/RSL_Types.ttcn
index 39ba3d319..0d772b320 100644
--- a/library/RSL_Types.ttcn
+++ b/library/RSL_Types.ttcn
@@ -565,6 +565,35 @@ module RSL_Types {
 		cause_ext := omit
 	}
 
+	/* 9.3.29 */
+	type record RSL_SacchInfo {
+		uint8_t len,
+		uint8_t num_msgs,
+		RSL_SacchInfoElements elems
+	} with {
+		variant (len) "LENGTHTO(num_msgs,elems)";
+		variant (num_msgs) "LENGTHTO(elems)";
+		variant (num_msgs) "UNIT(elements)"
+	};
+	type record RSL_SacchInfoElement {
+		RSL_IE_SysinfoType si_type,
+		uint8_t len,
+		octetstring msg
+	} with {
+		variant (len) "LENGTHTO(msg)";
+	};
+	type record of RSL_SacchInfoElement RSL_SacchInfoElements;
+	template (value) RSL_SacchInfo ts_RSL_SacchInfo(template (value) RSL_SacchInfoElements elems) := {
+		len := 0, /* overwritten */
+		num_msgs := 0, /* overwritten */
+		elems := elems
+	}
+	template (value) RSL_SacchInfoElement ts_RSL_SacchInfoElem(RSL_IE_SysinfoType tp, octetstring msg) := {
+		si_type := tp,
+		len := lengthof(msg),
+		msg := msg
+	}
+
 	/* 9.3.40 */
 	type enumerated RSL_ChanNeeded {
 		RSL_CHANNEED_ANY	('00'B),
@@ -703,6 +732,7 @@ module RSL_Types {
 		RSL_IE_ChanNeeded	chan_needed,
 		RSL_IE_CbCommandType	cb_cmd_type,
 		RSL_LV			smscb_message,
+		RSL_SacchInfo		sacch_info,
 
 		RSL_IE_StartingTime	starting_time,
 		RSL_IE_EncryptionInfo	encr_info,
@@ -755,6 +785,7 @@ module RSL_Types {
 					chan_needed, iei = RSL_IE_CHAN_NEEDED;
 					cb_cmd_type, iei = RSL_IE_CB_CMD_TYPE;
 					smscb_message, iei = RSL_IE_SMSCB_MSG;
+					sacch_info, iei = RSL_IE_SACCH_INFO;
 					starting_time, iei = RSL_IE_STARTNG_TIME;
 					encr_info, iei = RSL_IE_ENCR_INFO;