Sites with fewer than 100 cameras are usually analog, addressable over IP and connected to a DVR, said one industry expert. "This is more cost-effective than a full IP system," he said. Even though the primary advantage of an IP camera network is wiring, a repeater is required every 300 feet. Unshielded twisted-pair (UTP) cameras allow for cabling up to 1,000 feet. Using network cameras with such networks would not make sense financially.