US 7,548,616 B1
Termination device for a telephone line
Eliyahu Ponte, Netanya (Israel); and Yossef Reuven, Even-Yehuda (Israel)
Assigned to Infineon Technologies AG, Munich (Germany)
Appl. No. 10/258,581
PCT Filed May 22, 2000, PCT No. PCT/EP00/04649
§ 371(c)(1), (2), (4) Date Feb. 27, 2003,
PCT Pub. No. WO01/91439, PCT Pub. Date Nov. 29, 2001.
Int. Cl. H04M 9/08 (2006.01)
U.S. Cl. 379—399.01  [330/126; 370/235; 370/480; 370/524; 375/296; 379/378; 379/398; 379/413.02; 380/270] 34 Claims
OG exemplary drawing
 
1. A termination device for a telephone line of a wire based telephone system, said termination device comprising:
a high-pass filter for separating signals within a frequency band used by a high-speed modem for data transmission;
an impedance connected to the high-pass filter, wherein said impedance includes an impedance value which matches the impedance of the telephone line in the frequency band used by the high-speed modem for data transmission; and
a low-pass filter having a variable cut-off frequency, wherein the termination device includes first and second line-side terminals for connecting to a telephone line, wherein the high-pass filter is connected across the first and second line-side terminals, and wherein the impedance is connected across the high-pass filter.