- Cortelco Full duplex conference phone
- LCD with caller ID
- Hi-fidelity audio amplifier
- Redial
- Hold
- Mute
- Flash
- DSP Line echo cancellation > -20dB
- DSP Acoustic echo cancellation > -50dB
- Bi-directional noise suppression purifies voice signal from both parties > -18dB
ITTCP4400
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Telephony, PBX & VoIP > Conferencing