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Optional Octasic® DSP Echo Cancellation Module—EC4008
Octasic® Music ProtectionAdaptive Noise ReductionAutomatic Level Control (G.169)Field upgradeable algorithmV.25 / V.8 answer tone (w/ and w/o phase reversal)DTMF as per Q.24No CPU load as a result of echo cancellation.Does not increase the physical size of the card, and no additional slot is requiredStorage temperature: -40°C to 75°C