A system and method for power saving in IEEE 802-style and ITU-T G.984-style networks overcomes the limitations of conventional techniques using information from user and network devices for initiating power savings by the user or network device, enabling power savings on links such as optical networks. This innovative technique provides a system and method for communications between user and network devices, facilitating either the user or network device initiating a sleep mode for the user device. The implementation of a sleep mode in a device allows powering down of the device's transmitter and receiver for a specified length of time, during which the transmitter and receiver (also referred to as the physical interface of the device) consume diminished power.
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