Huawei ETS2000 Series Maintenance Manual page 20

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Figure1-21
Short circuit protection and overvoltage protection module
7. Startup/shutdown module
S301 fulfills the switch function. Turn the switch to the ON side, then TERM_ON:
Low electricity level startup pulse; SWITCH_ON: High electricity level startup
indicating signal. See Figure 1-23 for the circuit.
20

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