• Full Duplex Conference Telephone
• Cortelco Full Duplex Conference Phone
• Lcd With Caller Id
• Hifidelity Audio Amplifier
• Redial
• Hold
• Mute
• Flash
• Dsp Line Echo Cancellation > 20db
• Dsp Acoustic Echo Cancellation > 50db
• Bidirectional Noise Suppression Purifies Voice Signal From Both Parties > 18db
• Brand: Cortelco