Table 5-1 Fault Location and Possible Cause
Fault Type Possible Cause
ONT Registration Failure l The optical port on the ONT is abnormal.
l The fiber connected to the ONT is faulty.
l The optical power of the ONT is not within the
normal range.
l The ONT does not exist.
l The maximum logic distance configured for the
OLT port is inconsistent with the actual distance.
l The automatically finding function is disabled on
the OLT port.
l When the ONT is added, the configured SN is
inconsistent with the actual MAC address of the
ONT.
l An ONT with the same SN is already connected to
the OLT.
Failed to access the Internet
l The subscriber terminal or the subscriber loop is
faulty.
l The PON port is faulty.
l The data configuration of the upper-layer device is
incorrect.
l The PON board is faulty.
l The optical path is faulty.
l The control board or the uplink interface board is
faulty.
l There are network attacks.
l Check whether the PC route conflict exists.
l Check whether the WAN port obtains the address
successfully.
l Check whether the IP address segment obtained by
the PC is correct.
l Check whether the ONT WAN port and the ONT
address can be successfully pinged.
l Check whether the WAN MAC of ONT MAC
address is all Fs.
l The NAT conversion function for the bound WAN
port is not enabled.
l The LAN port is a L2 port, but the PC does not obtain
the public network address.
EchoLife HG861 GPON Terminal 5 Troubleshooting
Issue 01 (2009-07-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
5-3
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