Unshielded twisted pair (UTP) cables are found in many Ethernet networks and telephone systems. Unshielded twisted pair (UTP) cables are the primary cable type for telephone usage. Standard Category 5e unshielded twisted pair supports at S100. CCA is also seen in unshielded twisted pair networking cables. The transmission medium is an unshielded two-wire yellow flat cable. Unshielded cables rely on the quality of the twists to protect from EMI. Many nations regulate unshielded wired emissions as if they were radio transmitters. These characteristics are expected to be met by 100 meters of 24-gauge unshielded twisted-pair cable. An unshielded dielectric resonator can be used as a dielectric resonator antenna (DRA). Proteon later evolved a 16 Mbit/s version that ran on unshielded twisted pair cable. Mbit/s to the customer over about of unshielded twisted-pair copper wire. Another very common use is so-called punch-down blocks used for terminating unshielded twisted pair wiring. Four of the USS "Enterprise"-E's quantum torpedoes destroyed an unshielded Borg sphere. Mark VII guns installed in unshielded single mounts in the superstructure. These guns were installed in unshielded single mounts in the superstructure.