USE provisioning;
set autocommit=0;

SELECT id FROM voip_preferences WHERE attribute='outbound_socket' INTO @pref_id;

UPDATE voip_preferences SET usr_pref=0, dom_pref=0 WHERE id=@pref_id;
DELETE FROM voip_usr_preferences WHERE attribute_id=@pref_id;
DELETE FROM voip_dom_preferences WHERE attribute_id=@pref_id;

commit;