Erection of overhead transmission lines in the cable There are two main forms: OPGW (OPGH) and medium squaring fiber optic cable (ADSS). The new power line is usually used OPGH, ADSS commonly used in the power lines have been built, OPGH / ADSS cable fittings mainly Tension fittings, hanging fittings and connector boxes, deflectors folder, furniture, and other ancillary fittings.Erection of overhead transmission lines in the cable There are two main forms: OPGW (OPGH) and medium squaring fiber optic cable (ADSS). The new power line is usually used OPGH, ADSS commonly used in the power lines have been built, OPGH / ADSS cable fittings mainly Tension fittings, hanging fittings and connector boxes, deflectors folder, furniture, and other ancillary fittings.