--- chan_sip.c  2007-07-23 10:32:07.000000000 -0400
+++ chan_sip_fix.c      2007-12-01 15:30:51.000000000 -0500
@@ -2983,9 +2983,26 @@
         * Anyways, pedanticsipchecking controls whether we allow spaces before ':',
         * and we always allow spaces after that for compatibility.
         */
-       for (pass = 0; name && pass < 2;pass++) {
-               int x, len = strlen(name);
+
+       /*Find Last Authorization Line*/
+        int tmplen = 13;
+        int x;
+        char tmpchar[13] = "Authorization";
+
+       if (!strncasecmp(tmpchar,name,tmplen)) {
                for (x=*start; x<req->headers; x++) {
+                       if (!strncasecmp(req->header[x], name, tmplen)) {
+                       *start=x;
+                       }
+               }
+       /*      ast_verbose("Checking Multiple Authorization Lines, Starting At Header#: %u\n", x); */
+       }
+
+
+       for (pass = 0; name && pass < 2;pass++) {
+               int len = strlen(name);
+               for (x=*start; x<req->headers; x++) {
+
                        if (!strncasecmp(req->header[x], name, len)) {
                                char *r = req->header[x] + len; /* skip name */
                                if (pedanticsipchecking)