1. POTS -3dB cutoff frequency: 10kHz, 2 .Attenuation: 300Hz-3.4kHz,-1.0dB Max 3 .D.C. Resistance each line: 25 Ohm Max. 4 .Inserition loss (@200Hz to 4KHz) -1dB Max.,60KHz to 90KHz)> -20dB Max. 120KHz-300KHz>-40dB,500KHz-1104KHz>-65dB 5 .Return loss: 300-3.4kHz, -14dB Min. 6 .Longitudinal balance(CMRR): @200Hz to 1kHz,-58dB Min. @3kHz, -53dB Min. 7 .POTS loop current: 100mA DC 8 .Envelope delay distorition (0.6 to 3.4kHz): 100uS. Max. 9 .Impedance(@300Hz to 3.4kHz): 600 Ohm