6P6C Modular Jack for Voice and 10BASE-T
The TE Connectivity 1-1705950-1 is a 6-position 6-contact (6P6C) modular jack, wired for RJ11, RJ12, RJ14, and RJ25 applications. The unshielded PBT housing keeps it light and cost-effective for voice and 10BASE-T runs where foil shielding isn't needed.
This jack carries a Cat3 rating, which means it's certified for signal frequencies up to 16 MHz. That covers standard analog phone lines, ISDN, and 10BASE-T Ethernet. It won't pass Cat5e or Cat6 gigabit Ethernet — the crosstalk and return loss specs aren't there. For a desk phone, PBX drop, or legacy data port, it's the right call. If you need 100 MHz or better, you're looking at a Cat5e jack instead.
Board Locks and Right-Angle Mounting
The board locks are a practical detail — they anchor the jack to the PCB so the through-hole solder joints aren't the only thing resisting plug insertion and cable tug. The tab faces down, which matches the typical PCB layout for a standard modular jack footprint.