Unarmoured Telephone and Switch Board Cable is insulated with polyvinyl chloride to ensure fire retardance and high speed transmission. The Unarmoured Telephone Cable is made of high conductivity electrolytic grade annealed timed copper conductor and the insulated cores are twisted with a suitable lay to form a pair. Unarmoured Cable finds extensive usage in indoor telephone wiring, switch board wiring, private telephone exchanges, intercoms, telecommunication equipments etc. Universal Spares [India] Pvt. Ltd. Manufactures Unarmoured Telephone and Switch Board Cable.