Index: channels/chan_sip.c
diff -Nau channels/chan_sip.c.orig channels/chan_sip.c
--- channels/chan_sip.c.orig	2011-05-23 17:35:28.358543497 +0200
+++ channels/chan_sip.c	2011-05-23 17:57:05.948534524 +0200
@@ -29733,6 +29733,7 @@
 \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;
@@ -29741,7 +29742,7 @@
 	cdest = ast_strdupa(dest);
 
 	extension = strsep(&cdest, "@");
-	domain = 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;
@@ -29773,7 +29774,14 @@
 		}
 	}
 
-	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. */