WFT(wireless fixed station)电话接口方案

damy1975

Performs all BORSCHT functionsSoftware programmable internal balanced ringing up to 90VPK(5REN up to 4kft, 3REN up to 8kft)Integrated battery supply with dynamic voltage output (Si3210) On-chip dc-dc converter continuously minimizes power in all operating modes Entire solution can be powered from a single 3.3V or 5V supply  3.3V to 35V dc input range Dynamic 0V to –94.5V output Low cost inductor and high efficiency transformer versions supportedSoftware programmable linefeed parameters: Ringing frequency, amplitude, cadence, and waveshape 2-wire ac impedance and hybrid Constant current feed (20 to 41mA) Loop closure and ring trip thresholds and filteringSoftware programmable signal generation and audio processing: DTMF generation and decoding 12kHz/16kHz pulse metering generation Phase-continuous FSK (caller ID) generation  Dual audio tone generators Smooth and abrupt polarity reversal µ-Law/A-Law and 16-bit linear PCM audioExtensive test and diagnostic features Multiple voice loopback test modes Realtime dc linefeed measurement GR-909 line test capabilitiesSPI and PCM bus digital interfacesExtensive programmable interrupts100% software configurable global solutionIdeal for customer premise equipment applications