the TPW4670 transformer is de- signed to interface with the sub- scribers premises (nt) and the 2- wire line side of the central office equipment (lt) in the isdn network. TPW4670 meets the electrical specifications of ansi ti.601- 1988 and is approved for the siemens peb2091 device. TPW4670-1 meets the require- ments of the thomson sd5411 device isdn u-bus input/output transformer TPW4670 filtran limited 229 colonnade road, nepean, ontario, canada. k2e 7k3 4-8 tel : (613) 226 1626 fax : (613) 226 7124 issue: f 98/02/02 TPW4670.chpcs line impedance 135 w 135 w inductance (5-7)+(6-8) 14.5 mh 14.5 mh leakage inductance (2-11) < 55 m h < 55 m h winding capacitance (5-7)+(6-8) < 80 pf < 80 pf turns ratio (2-11) : (5-7)+(6-8) 1 : 1.6 1 : 1.5 longitudinal balance 1 - 4 khz > 65 db > 65 db 4 - 160 khz > 58 db > 58 db dc capability (line side) 50ma 50 ma dielectric strength 2000 v rms 2000 v rms. mechanical dot at pin 1 electrical TPW4670 TPW4670-1
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