diff --git a/contrib/ast-db-manage/config/versions/154177371065_add_default_from_user.py b/contrib/ast-db-manage/config/versions/154177371065_add_default_from_user.py
new file mode 100644
index 0000000000..7e6cf994f6
--- /dev/null
+++ b/contrib/ast-db-manage/config/versions/154177371065_add_default_from_user.py
@@ -0,0 +1,22 @@
+"""add default_from_user
+
+Revision ID: 154177371065
+Revises: 26f10cadc157
+Create Date: 2015-09-04 14:13:59.195013
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '154177371065'
+down_revision = '26f10cadc157'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    op.add_column('ps_globals', sa.Column('default_from_user', sa.String(80)))
+
+
+def downgrade():
+    op.drop_column('ps_globals', 'default_from_user')
diff --git a/include/asterisk/res_pjsip.h b/include/asterisk/res_pjsip.h
index 508a7be381..b7b875d0f9 100644
--- a/include/asterisk/res_pjsip.h
+++ b/include/asterisk/res_pjsip.h
@@ -2018,6 +2018,17 @@ char *ast_sip_get_debug(void);
  */
 char *ast_sip_get_endpoint_identifier_order(void);
 
+/*!
+ * \brief Retrieve the global default from user.
+ *
+ * This is the value placed in outbound requests' From header if there
+ * is no better option (such as an endpoint-configured from_user or
+ * caller ID number).
+ *
+ * \retval The global default_from_user value.
+ */
+const char *ast_sip_get_default_from_user(void);
+
 /*! \brief Determines whether the res_pjsip module is loaded */
 #define CHECK_PJSIP_MODULE_LOADED()				\
 	do {							\
diff --git a/res/res_pjsip.c b/res/res_pjsip.c
index b8463cecda..4af886b4ba 100644
--- a/res/res_pjsip.c
+++ b/res/res_pjsip.c
@@ -1286,6 +1286,11 @@
                                         Identifier names are usually derived from and can be found in the endpoint
                                         identifier module itself (res_pjsip_endpoint_identifier_*)</synopsis>
 				</configOption>
+				<configOption name="default_from_user" default="asterisk">
+					<synopsis>When Asterisk generates an outgoing SIP request, the From header username will be
+                                        set to this value if there is no better option (such as CallerID) to be
+                                        used.</synopsis>
+				</configOption>
 			</configObject>
 		</configFile>
 	</configInfo>
@@ -2333,10 +2338,9 @@ static int sip_dialog_create_from(pj_pool_t *pool, pj_str_t *from, const char *u
 	pjsip_sip_uri *sip_uri;
 	pjsip_transport_type_e type = PJSIP_TRANSPORT_UNSPECIFIED;
 	int local_port;
-	char uuid_str[AST_UUID_STR_LEN];
 
 	if (ast_strlen_zero(user)) {
-		user = ast_uuid_generate_str(uuid_str, sizeof(uuid_str));
+		user = ast_sip_get_default_from_user();
 	}
 
 	/* Parse the provided target URI so we can determine what transport it will end up using */
diff --git a/res/res_pjsip/config_global.c b/res/res_pjsip/config_global.c
index 42ba23487c..b348896c8f 100644
--- a/res/res_pjsip/config_global.c
+++ b/res/res_pjsip/config_global.c
@@ -34,6 +34,7 @@
 #define DEFAULT_DEBUG "no"
 #define DEFAULT_ENDPOINT_IDENTIFIER_ORDER "ip,username,anonymous"
 #define DEFAULT_MAX_INITIAL_QUALIFY_TIME 0
+#define DEFAULT_FROM_USER "asterisk"
 
 static char default_useragent[256];
 
@@ -46,6 +47,8 @@ struct global_config {
 		AST_STRING_FIELD(debug);
 		/*! Order by which endpoint identifiers are checked (comma separated list) */
 		AST_STRING_FIELD(endpoint_identifier_order);
+		/*! User name to place in From header if there is no better option */
+		AST_STRING_FIELD(default_from_user);
 	);
 	/* Value to put in Max-Forwards header */
 	unsigned int max_forwards;
@@ -179,6 +182,22 @@ unsigned int ast_sip_get_max_initial_qualify_time(void)
 	return time;
 }
 
+const char *ast_sip_get_default_from_user(void)
+{
+	const char *from_user;
+	struct global_config *cfg;
+
+	cfg = get_global_cfg();
+	if (!cfg) {
+		return DEFAULT_FROM_USER;
+	}
+
+	from_user = cfg->default_from_user;
+	ao2_ref(cfg, -1);
+
+	return from_user;
+}
+
 /*!
  * \internal
  * \brief Observer to set default global object if none exist.
@@ -292,6 +311,8 @@ int ast_sip_initialize_sorcery_global(void)
 	ast_sorcery_object_field_register(sorcery, "global", "max_initial_qualify_time",
 		__stringify(DEFAULT_MAX_INITIAL_QUALIFY_TIME),
 		OPT_UINT_T, 0, FLDSET(struct global_config, max_initial_qualify_time));
+	ast_sorcery_object_field_register(sorcery, "global", "default_from_user", DEFAULT_FROM_USER,
+		OPT_STRINGFIELD_T, 0, STRFLDSET(struct global_config, default_from_user));
 
 	if (ast_sorcery_instance_observer_add(sorcery, &observer_callbacks_global)) {
 		return -1;