| 摘要 |
A transmission repeater has a function of recovery to normal out of the deadlock state of auto-negotiation sequence between switches. The switches exchange auto-negotiation configuration codes via first and second transmission repeaters for a state transition. The first transmission repeat er monitors auto-negotiation configuration codes among data transmitted from th e opposed switch, and when detecting more than a predetermined number of configuration codes of auto-negotiation having been transmitted during a giv en period of time, determines that the auto-negotiation sequence between the switches is at a deadlock, and reports it to the second transmission repeate r , which then disconnects optical signals from the sending end of the second transmission repeater to the switch for more than twice the propagation time of signals between the switches, thus resolving the deadlock between the switches.
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