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

Line Impedance

135

Ω

135

Ω

Inductance

(5-7)+(6-8)

14.5 mH

14.5 mH

Leakage Inductance

(2-11)

< 55

µH

< 55

µH

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