600  - 600  Isolation Transformer - Used to provide isolation between Telstra lines and mains operated equipment..Austel Approved - Impedance: 600  line, 600  Equip. - Turns Ratio:1: 1 - Max Level: 0dBm @ 300Hz - Insertion Loss: 1dB max @ 0dBm300Hz - 5kHz - Freq Response: 300Hz~10kHz± 1dB, 0dBm - Return Loss:<15dB, 300Hz-5kHz - Max Unbal. DC:60mA - Proof Test:4Kv RMS - (HWD): 30 x 41 x 33mm - Weight:153 Grams