Modular Jacks consist of single or multi-port, stacked, high performance, jacks with LEDs, surface or PCB mount and shielded and unshielded varieties.  They offer compact size, high reliability and meet FCC Rules and Regulations, Part 68.  The high performance category 5 jacks conform to TIA/EIA-568A requirements.  The housing materials are available in polyester for wave solder applications and high temperature Nylon, PCT, or SPS for IR reflow applications.  All shields consist of copper alloy base metal with tin-lead plating over copper underplate.  All contacts are overall nickel plated phosphor bronze, with selectively plated gold in the contact area, and tin-lead in the solder area.