Circular self-supporting lead-in optical cable for outdoor use

Abstract

The invention relates to a circular self-supporting lead-in optical cable for outdoor use. The lead-in optical cable comprises: an optical fiber (1), a tight buffer (2), a reinforcement piece (3), an outer sheath (4) and a suspension wire (5), wherein the optical fiber (1) is arranged inside the tight buffer (2); the tight buffer (2) is externally coated with the reinforcement piece (3); the upper end of the reinforcement piece (3) is provided with the suspension wire (5); and the outer sheath (4) is extruded on the periphery of the reinforcement piece (3) and the suspension wire (5). The advantages of the lead-in optical cable are that: aramid is utilized in the reinforcement piece, so that the optical cable exhibits good softness performance and bending performance; the suspension wire is employed, so that there is no need to pre-arrange a steel wire for hanging the cable during construction and the construction is simple and convenient with high efficiency and low cost; besides, the cable is in a circular structure, so that cracking case resulted from human factors during the construction is prevented.

Description

technical field [0001] The invention relates to a leading optical cable, in particular to a circular self-supporting leading optical cable used indoors and outdoors. Background technique [0002] At present, the global broadband market is rapidly expanding, and ADSL is fully transitioning to FTTX technology. FTTX is optical fiber access. According to the distance from optical fiber to users, it mainly includes FTTC, FTTB, FTTH, FTTP, etc. FTTC mainly serves users in residential areas. FTTB is divided into two types by service objects, one is user services in apartment buildings, and the other is company line number services in commercial buildings. FTTH extends the distance of optical fiber to the home of end users , so that a variety of broadband services can be provided in the home, and FTTP extends the optical cable to the home or business. [0003] With the development of FTTX construction, the network topology presents a trend of diversification, which requires optica...

AI Technical Summary

Problems solved by technology

The lead-in cable adopts a butterfly structure, and there are grooves in the middle of both sides of the sheath. Although it is easy to peel off, the grooves have a certain tearing force, which limits the thickness of the sheath and cannot effectively protect the internal optical fibers; during construction , it is easy to cause the groove to crack due to human factors, resulting in waste

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