ISDN U-BUS Input/Output Transformer TPW4671 SCOPE The TPW4671 transformer is designed to interface with the subscribers premises (NT) and the 2- wire line side of the Central Office Equipment (LT) in the ISDN Network. TPW4671 meets the electrical specifications of ANSI TI.6011988 and is approved for the Mitel MT8910 DSLIC device. MECHANICAL Dot at pin 1 ISSUE: E 94/12/14 TPW4671.chp ELECTRICAL 135 Ω Line Impedance Inductance (2-11)+(1-12) 11.0mH (8-5) < 75 µH Winding Capacitance (2-11)+(1-12) < 500 pF Longitudinal Balance 1 - 4 KHz 4 - 160 KHz > 65 dB > 58 dB Leakage Inductance DC Capability (Line Side) Dielectric Strength Filtran Limited 50mA 2000 V rms 229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3 Tel : (613) 226 1626 Fax : (613) 226 7124 4-9