Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(Revision 292082)
+++ channels/chan_sip.c	(Arbeitskopie)
@@ -7197,16 +7197,8 @@
 	p->allowed_methods = UINT_MAX;
 
 	if (sip_methods[intended_method].need_rtp) {
-		if (ast_test_flag(&p->flags[1], SIP_PAGE2_T38SUPPORT)) {
-			if ((p->udptl = ast_udptl_new_with_bindaddr(sched, io, 0, &bindaddr))) {
-				ast_udptl_setqos(p->udptl, global_tos_audio, global_cos_audio);
-				p->t38_maxdatagram = global_t38_maxdatagram;
-			} else {
-				/* udptl creation failed, T38 can not be supported on this dialog */
-				ast_log(LOG_ERROR, "UDPTL creation failed\n");
-				ast_clear_flag(&p->flags[1], SIP_PAGE2_T38SUPPORT);
-			}
-		}
+		/* Removed UDPTL allocation for every sip pvt to prevent DOS effect and memory leaks
+		 * udptl will be allocated by handle_request_invite if necessary */
 		p->maxcallbitrate = default_maxcallbitrate;
 		p->autoframing = global_autoframing;
 	}