Link Led Off; Link Led Is On But Auth Led Is Off; Link Led And Auth Led Blink - Huawei EchoLife HG861 Manual

EchoLife HG861 GPON Terminal
Procedure
Step 1 Check whether the power adapter matches the device.
Step 2 Check whether the power cables are properly connected.
Step 3 Check whether the On/Off button on the rear plane has been turned on.
Step 4 Check whether the mains supply is normal. That is, whether the mains supply meets the
requirement of Huawei's product.
Step 5 Check whether the input voltage for the board is in the normal state. The normal voltage for the
DC is 11 V-14 V.
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5.3.2 LINK LED Off

This topic describes how to locate a fault when the LINK LED is off.
Procedure
Step 1 Check whether the optical fibers are properly connected.
Step 2 Measure the optical power of the 1490-nm wavelength in the downstream direction by using an
optical power meter. Check whether the optical power meets the preceding input requirement
of the GPON ONT.
Step 3 If the optical power does not meet the input requirement of the GPON ONT, check whether the
section of the optical fiber connected to the ONT is clean. Wipe the section in one direction with
special papers for wiping optical fibers or lens of cameras.
Step 4 Measure the optical power of the 1490-nm wavelength in the downstream direction again and
check whether the optical power meets the input requirement of the GPON ONT. If the optical
power does not meet the input requirement of the GPON ONT, it indicates that the optical fiber
link is faulty. Otherwise, proceed with the next step.
Step 5 Check whether the ONT connector is clean. Wipe the section of the connector in one direction
with special paper for wiping optical fibers or lens of cameras.
Step 6 If the fault persists, measure the voltage of the end connecting the resistance R378 on the board
and the optical transceiver if the condition is proper. Make sure that the optical fiber link is
connected properly. If the level is low, it indicates that the optical transceiver is damaged.
Otherwise, the CPU is faulty. If the optical transceiver is damaged, replace the optical
transceiver. Otherwise, it is recommended that you return the ONT for repair.
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5.3.3 LINK LED Is On but AUTH LED Is Off

The ONT fails to register with the OLT. Generally, the cause for this fault is that the downstream
input data is incorrectly restored. Therefore, check whether the input optical power is correct.

5.3.4 LINK LED and AUTH LED Blink

This topic describes how to locate a fault when the LINK and AUTH LEDs blink repeatedly.
Issue 01 (2009-07-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
5 Troubleshooting
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