22
3
Checking Indicator Statuses After Power-On
Use a multimeter to measure the resistance between circuit breakers including NEG (-), RTN (+), and PGND.
Resistance Between NEG (-)
and RTN (+)
Resistance Between NEG (-)
and PGND
Resistance Between RTN (+)
and PGND
+
∞
+
∞
≤10 Ω
Indicator
Whether the Indicators Are Steady Green
Normal State
Abnormal State
STAT/SRV/LINE/CPRI
Yes
No
Power off the chassis immediately and
power on the chassis again after the
fault is rectified.
2
Checking Power Supply Before Power-On
