Analogue Exchange Unit FXO Number of ports: 10 Mode: 2 wire Voice coding: ITU-T G.711 A Law Characteristics of 2w voice channel: ITU-T Q.552 Channel bandwidth: from 300 to 3,400Hz 2W TX Relative Level: from -18dBr to +7dBr 2W Rx Relative Level: from -23dBr to +1.5dBr Nominal impedance 2w: Z = 600 ohms Transmission of TeleTax pulses: 16kHz Compliant with the requirements of ITU-T K.21 Flexible time slot assignment Ring Voltage Detector 15Veff@25Hz "CLIP" function