Polycom SoundStructure C16 Design Manual page 331

• THD+N: < 0.005%, -20 dB FS input signal
• Common mode rejection ratio: <-61 dB, 20-20,000 Hz, no weighting
• Cross talk: <-110 dB, 20-20,000 Hz, 1 kHz, channel-to-channel
• Latency: Mic/Line inputs to outputs: 23 ms, AEC and NC processing
enabled
• Acoustic echo cancellation span: 200 ms
• Total cancellation: >65 dB
• Convergence rate: 40 dB/second
• Noise cancellation: 0-20 dB, software selectable
• Control inputs: contact closure
• Status outputs: open collector 60 V and 500 mA maximum total per
outputs
• All signal ground pins connected to chassis ground through low
impedance planes
Telco
• Input gain: -100 to +20 dB in 1 dB steps, software adjustable
• Nominal transmit level: 0 dBu in SoundStructure device yields -15 to -17
dBm to phone (country code dependent)
• Off hook loop current: 10 mA (minimum) to 120 mA (maximum)
• Output gain: -100 to +20 dB in 1 dB steps, software adjustable
• Frequency response: 250-3300 Hz
• Dynamic range: >70 dB FS, 250-3300 Hz, "A" weighted
Specifications
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