A method, system and apparatus are provided for detecting a loop-back in a physical layer on an Ethernet link. In the physical layer, a device sends a base page on the Ethernet link. The base page has at least one next page capability bit set. Subsequently, the device receives a received base page. Thereafter,...http://www.google.com/patents/US20070121518?utm_source=gb-gplus-sharePatent US20070121518 - Method and system for PHY loop detection
