--- channels/chan_sip.c	2004-04-20 10:35:01.000000000 +0100
+++ channels/chan_sip.c.orig	2004-04-20 10:34:06.000000000 +0100
@@ -110,7 +110,7 @@
 
 static char language[MAX_LANGUAGE] = "";
 
-static char callerid[AST_MAX_EXTENSION] = "unknown";
+static char callerid[AST_MAX_EXTENSION] = "asterisk";
 
 static char fromdomain[AST_MAX_EXTENSION] = "";