Air blown optical tube cable having creased optical tube

摘要

The present invention relates to an optical expansion possible and for the flexural properties improved pneumatic tube cable laying . Optical tube for pneumatic laying cables according to the present invention , the optical fiber cable sheath and the pressure unit is laid and the hollow portion is formed which extends into the cable sheath that is jongip jongip , the wrinkles on the outer surface of a predetermined interval so as to be elastic in the longitudinal direction includes one or more light tubes formed . Light tube according to the invention can be made a normal cable laying hadeorago cutting short the optical tube in the laying process , although possible to extend the length of the light tube , laid flexural properties of the optical tube is improved in the smooth curve of laying period is .