Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(revision 49667)
+++ channels/chan_sip.c	(working copy)
@@ -555,6 +555,7 @@
 static char global_realm[MAXHOSTNAMELEN]; 		/*!< Default realm */
 static char global_regcontext[AST_MAX_CONTEXT];		/*!< Context for auto-extensions */
 static char global_useragent[AST_MAX_EXTENSION];	/*!< Useragent for the SIP channel */
+static char global_auth_secret[80];	/*!< Default authentication scheme */
 static int allow_external_domains;	/*!< Accept calls to external SIP domains? */
 static int global_callevents;		/*!< Whether we send manager events or not */
 static int global_t1min;		/*!< T1 roundtrip time minimum */
@@ -10500,6 +10501,7 @@
 	ast_cli(fd, "  User Agent:             %s\n", global_useragent);
 	ast_cli(fd, "  MWI checking interval:  %d secs\n", global_mwitime);
 	ast_cli(fd, "  Reg. context:           %s\n", S_OR(global_regcontext, "(not set)"));
+	ast_cli(fd, "  Auth secret:            %s\n", S_OR(global_auth_secret, "(not set)"));
 	ast_cli(fd, "  Caller ID:              %s\n", default_callerid);
 	ast_cli(fd, "  From: Domain:           %s\n", default_fromdomain);
 	ast_cli(fd, "  Record SIP history:     %s\n", recordhistory ? "On" : "Off");
@@ -15966,6 +15968,7 @@
 	set_peer_defaults(peer);
 
 	ast_copy_string(peer->name, name, sizeof(peer->name));
+	ast_copy_string(peer->secret, global_auth_secret, sizeof(peer->secret));
 
 	ast_set_flag(&peer->flags[1], SIP_PAGE2_SELFDESTRUCT);
 	ast_set_flag(&peer->flags[1], SIP_PAGE2_DYNAMIC);
@@ -16294,6 +16297,7 @@
 	/* Reset channel settings to default before re-configuring */
 	allow_external_domains = DEFAULT_ALLOW_EXT_DOM;				/* Allow external invites */
 	global_regcontext[0] = '\0';
+	global_auth_secret[0] = '\0';
 	expiry = DEFAULT_EXPIRY;
 	global_notifyringing = DEFAULT_NOTIFYRINGING;
 	global_limitonpeers = FALSE;		/*!< Match call limit on peers only */
@@ -16447,6 +16451,8 @@
 					ast_context_create(NULL, context,"SIP");
 			}
 			ast_copy_string(global_regcontext, v->value, sizeof(global_regcontext));
+		} else if (!strcasecmp(v->name, "secret")) {
+			ast_copy_string(global_auth_secret, v->value, sizeof(global_auth_secret));
 		} else if (!strcasecmp(v->name, "callerid")) {
 			ast_copy_string(default_callerid, v->value, sizeof(default_callerid));
 		} else if (!strcasecmp(v->name, "fromdomain")) {