The Optical Distribution Network(ODN)is an important component part of FTTH networks and its quality is a focus of attention of project owners.On the basis of the performance test data statistics of the sampled ODN products
this paper summarizes the common defects of the main ODN products
analyzes their causes in details and put forward four measures for improvement.To control the quality of ODN products
it is necessary for ODN manufacturers
users and the relevant administrative departments to make joint efforts.