TV1	General Specification :     One voice port in single ISAslot     Data rate : 64 kbits/s      Perfect DTMF detection during voice playback       Full call progress analysis      Dos driver * Tone & pulse dialing      Software play and record volume control (25.4 db ) (0.1 db step)      Analog interface ( loop start)      A-law or U-law PCM coding      Frequency response : 300 HZ to 3400 Hz
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