CMX644A V.
22 and Bell 212A Modem D/644A/6 June 2000 Provisional Issue Features • • • • • • V.
22/Bell 212A Compatible Modem Integrated DTMF Encoder Call Progress/Accurate Answer Tone Detection Line Reversal and Ringing Detector Low Power Operation (2.
7V) Fully Integrated UART Functions Applications • • • • • • Telephone Telemetry Systems Remote Utility Meter Reading Security Systems/Cash Terminals Industrial Control Systems Pay-Phones Cable TV Set-Top Boxes 1.
1 Brief Description The CMX644A V.
22 modem is intended for use in any telephone based information and telemetry system with low power requirements.
Using V .
22 signalling, fast call set up times and robust error resistant transmissi...

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