A method of detecting signals propagated on a carrier medium includes the step of determining a noise threshold level, relative to a noise floor on a carrier medium, such as for example POTS wiring. A peak threshold level is then determined relative to peaks of a data signal. A data threshold level is...http://www.google.com/patents/US6292517?utm_source=gb-gplus-sharePatent US6292517 - Method and apparatus for detecting a data signal on a carrier medium
