CONTENTS

 Annex L - Error codes and service change reason description
        L.1     Scope
        L.2     Definitions
        L.3     References
        L.4     Error codes
                  L.4.1     Assigning error codes
                  L.4.2     Error code descriptions
        L.5     Service change reasons
                  L.5.1     Assigning service change reasons
                  L.5.2     Service change reason description