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 100? cable wiring schemes. Features: 6 position, 4 contact RJ-11 modular plug for Cat 3/5e and traditional phone wire; 50 micro-inch gold plating on contact mating area for long term reliability in connectivity, even after hundreds of mating cycles; Complies with industry standard mechanical and electrical specifications for compatibility with compliant telephone jacks and ports; Designed to work seamlessly with IDEAL Telemaster™ crimping tools. Also compatible with industry standard modular plug crimping tools meeting specifications.; Use with 1 or 2 line phone systems; Three prong contact design for use with solid or stranded 24-26 AWG insulated copper conductors; Permanent connection - once crimped they cannot be reused; Primary strain relief supports to retain cable jacket and minimize conductor movement once crimped; Non feed through design to prevent external conductor/device shorting and RF signal leakage