diff -rup opal-3.6.6.orig/src/sip/sippdu.cxx opal-3.6.6/src/sip/sippdu.cxx
--- opal-3.6.6.orig/src/sip/sippdu.cxx	2009-09-22 04:58:06.000000000 +0400
+++ opal-3.6.6/src/sip/sippdu.cxx	2010-03-06 23:38:08.000000000 +0300
@@ -2636,7 +2636,6 @@ PBoolean SIPTransaction::Start()
 
   // Use the connection transport to send the request
   if (!Write(transport, m_remoteAddress, m_localInterface)) {
-    SetTerminated(Terminated_TransportError);
     return PFalse;
   }
 
