Sterlite Technologies Limited manufactures Internal Exchange / Switchboard Copper Telecom Cables. Sterlite Technologies Limited is ISO 9001 certified company. The Internal Exchange / Switchboard Copper Telecom Cables deliver superior performance in data transmission and performance reliability. These are PVC insulated twisted pair PVC sheathed cables. These cables are recommended for wiring of exchanges for digital and analog signals. Internal Exchange / Switchboard copper telecom cables are suitable for indoor installation. They find usage in telecommunication networks.