Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(revision 101224)
+++ channels/chan_sip.c	(arbetskopia)
@@ -9518,6 +9518,7 @@
 				ast_string_field_set(p, peermd5secret, peer->md5secret);
 				ast_string_field_set(p, language, peer->language);
 				ast_string_field_set(p, accountcode, peer->accountcode);
+				p->peerauth = peer->auth;
 				p->amaflags = peer->amaflags;
 				p->callgroup = peer->callgroup;
 				p->pickupgroup = peer->pickupgroup;
@@ -11488,7 +11489,9 @@
 	snprintf(cnonce, sizeof(cnonce), "%08lx", ast_random());
 
  	/* Check if we have separate auth credentials */
- 	if ((auth = find_realm_authentication(authl, p->realm))) {
+ 	if (p->peerauth) 
+		auth = find_realm_authentication(p->peerauth, p->realm);
+ 	if (auth || (auth = find_realm_authentication(authl, p->realm))) {
 		ast_log(LOG_WARNING, "use realm [%s] from peer [%s][%s]\n",
 			auth->username, p->peername, p->username);
  		username = auth->username;