BC-66 RJ12 Patchcord Cables Bel BC-66 RJ12 Patchcord Cables are cable assemblies with six positions and six contact modular plugs. These modular plugs are available in straight (BC-66SSxF) and reverse (BC-66RSxF) configurations. The BC-66 cables employ individually bagged cable assemblies. These cable assemblies have 28AWG flat telephone wire construction and a 300V voltage rating. Bel BC-66 RJ12 Patchcord Cables offer 8Ω conductor resistance and 5MΩ insulation resistance.