local area network (lan) node of the kind described in the enhanced standard ansi / ieee 802.5, consisting of a receiver and demodulator (20) has a gate connected to the ring and provided with an output received (24) and a clock output from a buffer (26), (38) connected to the elastic out of received data (24).a modulator (30) for adjusting the output of the buffer (38) on the basis of a signal at the entry level of synchronization (28) of the modulator (30), and a phase lock loop (48) interposed between the output of the clock received from the demodulator (26) (20) and the sync input article (28) of the valve (30), the loop comprising a voltage controlled oscillator (50), ina phase detector (54), and a filter (60) is connected to provide a control voltage to the oscillator (50).
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