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Two RJ11 component Tip and Ring Flyback protection.

HORIZONTAL PLASTIC 6P6C MODULAR JACK TAP UP RJ12, RJ18, RJ25

C2012X7T2E104K125AA 0.1 µF ±10% 250V Ceramic Capacitor X7T 0805 (2012 Metric)

RES 10 OHM 1% 1/10W 0603

Integrated Circuit Central Office Interface Circuit (COIC) , Through hole, 20-SIP Module

IC DUAL VOIP CODEC 48-LQFP