diff --git a/openbsc/src/mgcp/mgcp_protocol.c b/openbsc/src/mgcp/mgcp_protocol.c
index 998476d..6d5713c 100644
--- a/openbsc/src/mgcp/mgcp_protocol.c
+++ b/openbsc/src/mgcp/mgcp_protocol.c
@@ -485,6 +485,7 @@
 	const char *trans_id;
 	struct mgcp_endpoint *endp;
 	int error_code = 500;
+	int silent = 0;
 
 	found = mgcp_analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp);
 	if (found != 0)
@@ -517,6 +518,9 @@
 		    goto error3;
 		}
 		break;
+	case 'Z':
+		silent = strcmp("noanswer", (const char *)&msg->l3h[line_start + 3]) == 0;
+		break;
 	case '\0':
 		/* SDP file begins */
 		break;
@@ -562,6 +566,8 @@
 		case MGCP_POLICY_REJECT:
 			LOGP(DMGCP, LOGL_NOTICE, "MDCX rejected by policy on 0x%x\n",
 			     ENDPOINT_NUMBER(endp));
+			if (silent)
+				goto out_silent;
 			return create_response(500, "MDCX", trans_id);
 			break;
 		case MGCP_POLICY_DEFER:
@@ -579,6 +585,9 @@
 		ENDPOINT_NUMBER(endp), inet_ntoa(endp->remote), ntohs(endp->net_rtp));
 	if (cfg->change_cb)
 		cfg->change_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_MDCX, endp->rtp_port);
+	if (silent)
+		goto out_silent;
+
 	return create_response_with_sdp(endp, "MDCX", trans_id);
 
 error:
@@ -589,6 +598,10 @@
 
 error3:
 	return create_response(error_code, "MDCX", trans_id);
+
+
+out_silent:
+	return NULL;
 }
 
 static struct msgb *handle_delete_con(struct mgcp_config *cfg, struct msgb *msg)
@@ -598,6 +611,7 @@
 	const char *trans_id;
 	struct mgcp_endpoint *endp;
 	int error_code = 500;
+	int silent = 0;
 
 	found = mgcp_analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp);
 	if (found != 0)
@@ -619,6 +633,9 @@
 		if (verify_ci(endp, (const char *)&msg->l3h[line_start + 3]) != 0)
 			goto error3;
 		break;
+	case 'Z':
+		silent = strcmp("noanswer", (const char *)&msg->l3h[line_start + 3]) == 0;
+		break;
 	}
 	default:
 		LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n",
@@ -634,6 +651,8 @@
 		case MGCP_POLICY_REJECT:
 			LOGP(DMGCP, LOGL_NOTICE, "DLCX rejected by policy on 0x%x\n",
 			     ENDPOINT_NUMBER(endp));
+			if (silent)
+				goto out_silent;
 			return create_response(500, "DLCX", trans_id);
 			break;
 		case MGCP_POLICY_DEFER:
@@ -653,6 +672,8 @@
 	if (cfg->change_cb)
 		cfg->change_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_DLCX, endp->rtp_port);
 
+	if (silent)
+		goto out_silent;
 	return create_response(250, "DLCX", trans_id);
 
 error:
@@ -663,6 +684,9 @@
 
 error3:
 	return create_response(error_code, "DLCX", trans_id);
+
+out_silent:
+	return NULL;
 }
 
 static struct msgb *handle_rsip(struct mgcp_config *cfg, struct msgb *msg)