diff --git a/openbsc/src/mgcp/mgcp_main.c b/openbsc/src/mgcp/mgcp_main.c
index 80b7b54..f7f1f80 100644
--- a/openbsc/src/mgcp/mgcp_main.c
+++ b/openbsc/src/mgcp/mgcp_main.c
@@ -128,6 +128,15 @@
 	return 0;
 }
 
+static int mgcp_change_cb(struct mgcp_config *cfg, int endpoint, int state, int local_rtp)
+{
+	if (state != MGCP_ENDP_MDCX)
+		return 0;
+
+	mgcp_send_dummy(&cfg->endpoints[endpoint]);
+	return 0;
+}
+
 static int read_call_agent(struct bsc_fd *fd, unsigned int what)
 {
 	struct sockaddr_in addr;
@@ -200,6 +209,7 @@
 
 	/* set some callbacks */
 	cfg->reset_cb = mgcp_rsip_cb;
+	cfg->change_cb = mgcp_change_cb;
 
         /* we need to bind a socket */
         if (rc == 0) {