This is a RJ9 Connector application for Cat3 cable.
RJ9 plugs are a type of plug typically used for carrying telephone signals.
4P4C means that the contacts on these plugs have 4 positions in which are placed 4 gold plated contacts, a standard for RJ9 jacks.
Gold plated leads for better data transmitting and higher signal strength.
Clear plastic housing with gold-plated contacts for fast and accurate data transmission.