Patent Document ID: 5475711
Application ID: 08307497
Patent Flag: 1

Claim One:
1. A method of determining an optimum bandwidth for transmission of data over a transmission line, the method comprising the steps of: transmitting data signals having wideband characteristics from a first modem on the transmission line; obtaining the data signals in a second modem and, in response to the wideband characteristics of said data signals, a measure of the signal and noise spectrum present on the transmission line, the measure of the signal spectrum being obtained by a spectrum analyzer, and the measure of the noise spectrum being obtained by a signal-to-noise ratio circuit; transmitting from said second modem to said first modem data from both the spectrum analyzer and the signal-to-noise ratio circuit, the data from the spectrum analyzer being indicative of the measure of the signal spectrum present on the transmission line and the data from the signal-to-noise ratio circuit being indicative of the measure of the noise spectrum present on the transmission line; and selecting in said first modem the optimum bandwidth for the transmission of data over the transmission line responsive to the measure of the signal and noise spectrum present on the line.