The steel wire armor of optical cables usually adopts cage type stranding, with a number of stranding discs ranging from 12 to 96. The steel wire payout reel can be equipped with standard I-shaped wheels of PN630 and PN800 specifications. The driving force for the rotation of the twisting cage can be mechanical ground shaft transmission or electric motor drive. Armored steel wire is generally made of high carbon phosphated steel wire or medium carbon galvanized steel wire. Its production line configuration can mainly be divided into two types: fine steel wire and coarse steel wire armor. It includes cable core laying device, filling gel device, yarn tying or wrapping device, and traction device, etc.