CPC H04B 10/25 (2013.01) [H04B 10/07 (2013.01); H04B 10/07955 (2013.01); H04B 10/2589 (2020.05); H04B 10/40 (2013.01); H04B 10/6932 (2013.01); H04L 1/0002 (2013.01); H04L 5/1446 (2013.01); H04L 12/40136 (2013.01)] | 10 Claims |
1. An operation method of a network device, the network device receiving an input signal from a link partner through a fiber medium, the method comprising:
setting a target speed of the network device to a first speed;
transmitting and/or receiving data at the first speed; and
setting the target speed of the network device to a second speed which is different from the first speed and transmitting an Idle code group or IDLE ordered sets at the second speed to notify the link partner that an up-link to the link partner remains when an amplitude or energy of the input signal is not greater than a threshold;
wherein the link partner is not operating at the second speed when the Idle code group or IDLE ordered sets is being transmitted.
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