Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(revision 355362)
+++ channels/chan_sip.c	(working copy)
@@ -28642,10 +28642,10 @@
 		default_transports &= ~SIP_TRANSPORT_TLS;
 	}
 	if (!default_transports) {
-		ast_log(LOG_WARNING, "No valid transports available, falling back to 'udp'.\n");
+		ast_log(LOG_NOTICE, "No valid default transports configured, falling back to 'udp'.\n");
 		default_transports = default_primary_transport = SIP_TRANSPORT_UDP;
 	} else if (!default_primary_transport) {
-		ast_log(LOG_WARNING, "No valid default transport. Selecting 'udp' as default.\n");
+		ast_log(LOG_NOTICE, "No valid default primary transport configured. Selecting 'udp' as default.\n");
 		default_primary_transport = SIP_TRANSPORT_UDP;
 	}
 
Index: configs/sip.conf.sample
===================================================================
--- configs/sip.conf.sample	(revision 355362)
+++ configs/sip.conf.sample	(working copy)
@@ -223,6 +223,9 @@
 				; unauthenticated sessions that will be allowed
                                 ; to connect at any given time. (default: 100)
 
+transport=udp                   ; Set the default transports.  The order determines the primary default transport.
+                                ; If tcpenable=no and the transport set is tcp, we will fallback to UDP.
+
 srvlookup=yes                   ; Enable DNS SRV lookups on outbound calls
                                 ; Note: Asterisk only uses the first host
                                 ; in SRV records