diff --git a/library/RTP_Emulation.ttcn b/library/RTP_Emulation.ttcn
index 8c5dbc9..f4d926e 100644
--- a/library/RTP_Emulation.ttcn
+++ b/library/RTP_Emulation.ttcn
@@ -448,6 +448,10 @@
 				mtc.stop;
 			}
 			g_tx_connected := true;
+			/* Send any pending IuUP CTRL message whichwas delayed due to not being connected: */
+			if (isvalue(g_iuup_ent.pending_tx_pdu)) {
+				f_tx_rtp(''O);
+			}
 			CTRL.reply(RTPEM_connect:{g_remote_host, g_remote_port});
 		}
 		[] CTRL.getcall(RTPEM_mode:{RTPEM_MODE_NONE}) {
@@ -511,7 +515,7 @@
 				if (lengthof(rx_rtp.msg.rtp.data) != 0) {
 					/* Unexpected RTP payload (user data) arrived: */
 					g_stats_rtp.num_pkts_rx_err_disabled := g_stats_rtp.num_pkts_rx_err_disabled+1;
-				} else if (isvalue(g_iuup_ent.pending_tx_pdu)) {
+				} else if (g_tx_connected and isvalue(g_iuup_ent.pending_tx_pdu)) {
 					/* IuUP Control packet was received and requires sending back something: */
 					f_tx_rtp(''O);
 				}
@@ -536,7 +540,7 @@
 				rx_rtp.msg.rtp.data := f_IuUP_Em_rx_decaps(g_iuup_ent, rx_rtp.msg.rtp.data);
 				/* IuUP Control packet was received which may require sending back something: */
 				if (lengthof(rx_rtp.msg.rtp.data) == 0) {
-					if (isvalue(g_iuup_ent.pending_tx_pdu)) {
+					if (g_tx_connected and isvalue(g_iuup_ent.pending_tx_pdu)) {
 						f_tx_rtp(''O);
 					}
 					repeat;