Index: channels/chan_iax2.c
===================================================================
--- channels/chan_iax2.c	(revision 332019)
+++ channels/chan_iax2.c	(working copy)
@@ -4941,7 +4941,14 @@
 		/* these two cannot be sent, because they require a result */
 		errno = ENOSYS;
 		return -1;
-	default:
+ 	/* These options are sent to the other side across the network where
+ 	 * they will be passed to whatever channel is bridged there. Don't
+ 	 * do anything silly like pass an option that transmits pointers to
+ 	 * memory on this machine to a remote machine to use */
+ 	case AST_OPTION_TONE_VERIFY:
+ 	case AST_OPTION_TDD:
+ 	case AST_OPTION_RELAXDTMF:
+ 	case AST_OPTION_AUDIO_MODE:
 	{
 		unsigned short callno = PTR_TO_CALLNO(c->tech_pvt);
 		struct chan_iax2_pvt *pvt;
@@ -4969,7 +4976,12 @@
 		ast_free(h);
 		return res;
 	}
+	default:
+		return -1;
 	}
+
+	/* Just in case someone does a break instead of a return */
+	return -1;
 }
 
 static struct ast_frame *iax2_read(struct ast_channel *c) 
Index: main/features.c
===================================================================
--- main/features.c	(revision 332019)
+++ main/features.c	(working copy)
@@ -2663,10 +2663,19 @@
 				break;
 			case AST_CONTROL_OPTION:
 				aoh = f->data.ptr;
-				/* Forward option Requests */
+				/* Forward option Requests, but only ones we know are safe
+				 * These are ONLY sent by chan_iax2 and I'm not convinced that
+				 * they are useful. I haven't deleted them entirely because I
+				 * just am not sure of the ramifications of removing them. */
 				if (aoh && aoh->flag == AST_OPTION_FLAG_REQUEST) {
-					ast_channel_setoption(other, ntohs(aoh->option), aoh->data, 
-						f->datalen - sizeof(struct ast_option_header), 0);
+				   	switch (ntohs(aoh->option)) {
+					case AST_OPTION_TONE_VERIFY:
+					case AST_OPTION_TDD:
+					case AST_OPTION_RELAXDTMF:
+					case AST_OPTION_AUDIO_MODE:
+						ast_channel_setoption(other, ntohs(aoh->option), aoh->data, 
+							f->datalen - sizeof(struct ast_option_header), 0);
+					}
 				}
 				break;
 			}