Method for checking transmission properties of a subscriber line

Details Method for checking transmission properties of a subscriber line Method for checking transmission properties of a subscriber line

1991-04-11

1993-04-13

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

328147, 379 27, 371 201, H04J 314, H04M 330

Patent

active

052028828

ABSTRACT:
Given the prerequisite of a division of a subscriber line circuit into a high-voltage portion and a signal processor that defines the transmission-oriented properties, voltages arising at significant locations of the receiving branch and of the transmitting branch of the signal processor as a result of supplied and reflected sine signals are taken via a digital interface and specific transmission properties such as reflection attenuation and hybrid transfer attenuation are calculated therefrom on the basis of a correlation.

REFERENCES:
patent: 4376450 (1983-03-01), Fayfield et al.
patent: 4583216 (1986-04-01), Gatmezei et al.
patent: 4730302 (1988-03-01), Fuerlinger et al.
patent: 4999521 (1991-03-01), Rusznyak
patent: 5039878 (1991-08-01), Armstrong et al.

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