The six position RJ-11 style modular plug is traditionally used in voice/phone applications. Two versions are available: 6P6C (six position/six contact) and 6P4C (six position/four contact). The RJ-11 6P4C (four contacts) is used for 1 or 2 line phone systems common in residential systems. The RJ-12 6P6C (six contacts) is used for 1, 2, or 3 line systems and is found in more commercial systems. Modular plug connectors support the latest TIA/EIA standards for twisted pair cabling. IDEAL modular plugs are designed to work seamlessly with the IDEAL Telemaster series of modular plug crimp tools. Plugs are designed and manufactured to support all 100O cable wiring schemes.