Polycom C12, SR12, C16, C8 manual Telco

Specifications

•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, 1kHz, channel-to-channel

•Latency: Mic/Line inputs to outputs: 20 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

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