--- asterisk-11.14.0/channels/chan_sip.c	2014-10-30 02:58:02.000000000 +0100
+++ asterisk-11.14.0-w1/channels/chan_sip.c	2014-11-17 01:24:04.316179012 +0100
@@ -18467,6 +18467,14 @@
 	char from_name[50];
 	char stripped[SIPBUFSIZE];
 
+	if (strncmp(content_type, "asn1/aoc", strlen("asn1/aoc"))) {
+	 		transmit_response(p, "202 Accepted", req);	/* Fake reply */
+		if (!p->owner) {					/* Would be good if we would actually handle the message */
+			sip_scheddestroy(p, DEFAULT_TRANS_TIMEOUT);	/* But at least the calls won't get dropped this way */
+		}
+		return;
+	}
+
 	if (strncmp(content_type, "text/plain", strlen("text/plain"))) { /* No text/plain attachment */
 		transmit_response(p, "415 Unsupported Media Type", req); /* Good enough, or? */
 		if (!p->owner) {