Index: channels/chan_iax2.c
===================================================================
--- channels/chan_iax2.c	(revision 131480)
+++ channels/chan_iax2.c	(working copy)
@@ -1051,8 +1051,8 @@
 			/* I am the schedule, so I'm allowed to do this */
 			iaxs[callno]->lagid = -1;
 		}
-	} else if (option_debug > 0) {
-		ast_log(LOG_DEBUG, "I was supposed to send a LAGRQ with callno %d, but no such call exists (and I cannot remove lagid, either).\n", callno);
+	} else {
+		ast_log(LOG_ERROR, "I was supposed to send a LAGRQ with callno %d, but no such call exists (and I cannot remove lagid, either).\n", callno);
 	}
 
 	ast_mutex_unlock(&iaxsl[callno]);
@@ -1618,10 +1618,10 @@
 			snprintf(host, sizeof(host), "%s:%d", ast_inet_ntoa(sin->sin_addr), ntohs(sin->sin_port));
 
 		now = ast_tvnow();
-		start = 1 + (ast_random() % (TRUNK_CALL_START - 1));
+		start = 2 + (ast_random() % (TRUNK_CALL_START - 1));
 		for (x = start; 1; x++) {
 			if (x == TRUNK_CALL_START) {
-				x = 0;
+				x = 1;
 				continue;
 			}
 
@@ -2147,6 +2147,15 @@
 	return res;
 }
 
+static int send_apathetic_reply(unsigned short callno, unsigned short dcallno, struct sockaddr_in *sin, int command, int ts, unsigned char seqno)
+{
+	struct ast_iax2_full_hdr f = { .scallno = htons(0x8000 | callno), .dcallno = htons(dcallno),
+		.ts = htonl(ts), .iseqno = seqno, .oseqno = seqno, .type = AST_FRAME_IAX,
+		.csub = compress_subclass(command) };
+
+	return sendto(defaultsockfd, &f, sizeof(f), 0, (struct sockaddr *)sin, sizeof(*sin));
+}
+
 /*!
  * \note Since this function calls iax2_queue_hangup(), the pvt struct
  *       for the given call number may disappear during its execution.
@@ -7180,6 +7189,17 @@
 		} else {
 			f.subclass = uncompress_subclass(fh->csub);
 		}
+
+		/* Deal with POKE/PONG without allocating a callno */
+		if (f.frametype == AST_FRAME_IAX && f.subclass == IAX_COMMAND_POKE) {
+			/* Reply back with a PONG, but don't care about the result. */
+			send_apathetic_reply(1, ntohs(fh->scallno), &sin, IAX_COMMAND_PONG, ntohs(fh->ts), fh->oseqno);
+			return 1;
+		} else if (f.frametype == AST_FRAME_IAX && f.subclass == IAX_COMMAND_ACK && dcallno == 1) {
+			/* Ignore */
+			return 1;
+		}
+
 		if ((f.frametype == AST_FRAME_IAX) && ((f.subclass == IAX_COMMAND_NEW) || (f.subclass == IAX_COMMAND_REGREQ) ||
 						       (f.subclass == IAX_COMMAND_POKE) || (f.subclass == IAX_COMMAND_FWDOWNL) ||
 						       (f.subclass == IAX_COMMAND_REGREL)))
Index: include/asterisk/sched.h
===================================================================
--- include/asterisk/sched.h	(revision 131479)
+++ include/asterisk/sched.h	(working copy)
@@ -118,7 +118,8 @@
  * \param id ID of the scheduled item to delete
  * \return Returns 0 on success, -1 on failure
  */
-int ast_sched_del(struct sched_context *con, int id);
+int _ast_sched_del(struct sched_context *con, int id, const char *file, int line, const char *function);
+#define	ast_sched_del(a, b)	_ast_sched_del(a, b, __FILE__, __LINE__, __PRETTY_FUNCTION__)
 
 /*! \brief Determines number of seconds until the next outstanding event to take place
  * Determine the number of seconds until the next outstanding event
Index: main/sched.c
===================================================================
--- main/sched.c	(revision 131479)
+++ main/sched.c	(working copy)
@@ -255,7 +255,7 @@
  * would be two or more in the list with that
  * id.
  */
-int ast_sched_del(struct sched_context *con, int id)
+int _ast_sched_del(struct sched_context *con, int id, const char *file, int line, const char *function)
 {
 	struct sched *s;
 
@@ -282,7 +282,7 @@
 	if (!s) {
 		if (option_debug)
 			ast_log(LOG_DEBUG, "Attempted to delete nonexistent schedule entry %d!\n", id);
-		ast_assert(s != NULL);
+		_ast_assert(0, "s != NULL", file, line, function);
 		return -1;
 	}