Existing out of 6 tubes with a diameter of 1. For outdoor use in structured (data) wiring systems such as industrial backbone, campus backbone, building backbone (riser) and/or horizontal cabling. ations, complying with IEC standards for low smoke/zero halogen and Eu oClass (Cca or B2ca) for fire protection. The cable shall also be water-blocked for use in outdoor environments. 657A1 BIF, INDOOR/OUTDOOR REMEE C CABLE 48 -SM OS2 G. It is the ole. Fiber Optic Outside Plant Cable, 48-core, ECSS (Electro Chrome Coated Steel) Armored, Loose-tube, Gel-filled, 9/125 µm, OS2, Singlemode, Black cable jacket Click on image to enlarge. The loose tube gel-free design is fully waterblocked using craft-friendly, water-swellable materials, which means cable access is simple and no clean. GBLHF48 - Outdoor OFC MLT: ARAMID + PE + PA + CST + PE with 6 Tubes of Ø1. Outdoor dry core optical fiber Multi Loose Tube cable with aramid yarns as strength member, polyethylene inner jacket, termite protection by polyamide layer, Corrugated Steel Tape (Full Rodent. 48 Core GYTS Fiber Optic Cable is the outdoor fiber optic cable type used for duct and aerial applications. A related GYTA type cable is available.