Si2494/39 V.
9 2 AND V.
3 4 I S O MODEM® WITH G LOBAL D A A Features  Data modem formats ITU-T, Bell 300 bps up to 56 kbps V.
21,V.
22, V.
29 Fast Connect V.
44, V.
42, V.
42bis, MNP2-5 Automatic rate negotiation V.
92 PCM upstream V.
92 Quick connect V.
92 Modem on hold  Type I and II caller ID decode  No external ROM or RAM required  UART, SPI, or parallel interface  Flexible clock options Low-cost 32.
768 kHz oscillator 4.
915 MHz oscillator 27 MHz clock input  Integrated DAA Over 6000 V capacitive isolation Parallel phone detect Globally-compliant line interface Overcurrent detection  AT command set support  SMS / MMS support  Firmware upgradeable Applicatio...

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