Vindhya Telelinks Ltd. Supplies Underground Jelly Filled Quad Cables. Vindhya Telelinks Ltd. Has been awarded ISO 9001:2008 and 14001:2004 certification. Underground Jelly Filled Quad Cables are polyethylene insulated, aluminium screened in the form of wire/strip, galvanized steel tape armoured & PVC jacketed special signalling cable required for axle counter installations suitable for use in electrified areas. Underground Jelly Filled Quad Cables constructed of conductor, insulation, quadding, laying up, filling and core wrapping, sheathing, screening and protection, armouring and jacketing.