diff -r 73d852a30c9a -r 263143ec0fb2 asterisk/asterisk.patch.xfersips
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/asterisk/asterisk.patch.xfersips	Sun Mar 20 20:03:11 2011 +0100
@@ -0,0 +1,37 @@
+Index: channels/chan_sip.c
+diff -Nau channels/chan_sip.c.orig channels/chan_sip.c
+--- channels/chan_sip.c.orig	2011-01-14 18:32:52.000000000 +0100
++++ channels/chan_sip.c	2011-03-13 14:32:58.000000000 +0100
+@@ -27854,6 +27854,7 @@
+ \todo	Fix this function so that we wait for reply to the REFER and
+ 	react to errors, denials or other issues the other end might have.
+  */
++/* MSvB: Paramater dest may be SIPS encoded, having '@' before domain */
+ static int sip_sipredirect(struct sip_pvt *p, const char *dest)
+ {
+ 	char *cdest;
+@@ -27862,7 +27863,7 @@
+ 	cdest = ast_strdupa(dest);
+ 	
+ 	extension = strsep(&cdest, "@");
+-	domain = strsep(&cdest, ":");
++	domain = strsep(&cdest, ":");     /* MSvB: Could begin with '@' if SIPS */
+ 	if (ast_strlen_zero(extension)) {
+ 		ast_log(LOG_ERROR, "Missing mandatory argument: extension\n");
+ 		return 0;
+@@ -27894,7 +27895,14 @@
+ 		}
+ 	}
+ 
+-	ast_string_field_build(p, our_contact, "Transfer <sip:%s@%s>", extension, domain);
++	if (domain && *domain == '@') {
++		ast_log(LOG_DEBUG, "Decoding TLS incapable Asterisk SIP URI to a standard SIPS URI before redirecting via 302 Moved Temporarily\n");
++		ast_string_field_build(p, our_contact, "Transfer <sips:%s@%s>", extension, domain);
++
++	}
++	else
++		ast_string_field_build(p, our_contact, "Transfer <sip:%s@%s>", extension, domain);
++
+ 	transmit_response_reliable(p, "302 Moved Temporarily", &p->initreq);
+ 
+ 	sip_scheddestroy(p, SIP_TRANS_TIMEOUT);	/* Make sure we stop send this reply. */