Description
Features
Dual-mode wideband (50 Hz to 7.0 kHz) / narrowband (200 Hz to 3.4 kHz) audio codec with 16-bit, 16 kHz sampling for high fidelity audio
Adaptive battery voltage generation minimizes power in all operating modes
Entire solution can be powered from a single 3.3 or 5 V supply
Five REN sinewave or trapezoid internal ringing up to 90 VPK
Ringing amplitude, frequency and cadence
Constant current loop feed (20–41 mA)
Ring trip/loop closure thresholds and filtering
Two-wire ac impedance and transhybrid
DTMF and FSK (caller ID)
Polarity reversal
