CONTENTS

 1     Scope
 2     In-service maintenance
Appendix I – Remarks on the way for in-service maintenance of optical fibres
Appendix II – Japanese consideration for selecting maintenance wavelength
       II.1     Present Japanese maintenance wavelength
       II.2     Reason
                 II.2.1     Laser diode (LD) market
                 II.2.2     Filter
                 II.2.3     Fibre identification
       II.3     Direction for the future
                 II.3.1     LD market
                 II.3.2     Filter
                 II.3.3     Fibre identification and handling
       II.4     Result
Appendix III – Information of bending loss for considering the wavelength assigned