Table 4-2
Locate a fault preliminarily
Fault Type
Possible Cause
ONT registration failure
l
The PON terminal goes online in an
incorrect mode.
l
The optical fiber connected to the ONT is of
poor quality or is loosely connected.
l
The optical power of the ONT is not within
the normal range.
l
The minimum and maximum logical
distances configured on the OLT port to
which the ONT is connected are inconsistent
with the actual distances.
l
The ONT auto-find function is disabled on
the OLT.
l
When the ONT is added, the configured SN
of the ONT is different from the actual ONT
SN.
l
An ONT with the same SN is already
connected to the OLT.
l
The ONT is a rogue ONT.
Call failure or poor voice quality
l
The connection between the telephone set
and the ONT is abnormal.
l
The ONT port to which the telephone set is
connected is configured incorrectly.
l
The telephone set does not register with the
voice server.
l
The voice service of the telephone set is not
configured with a high priority.
l
The line connections are abnormal.
l
The telephone set is faulty.
l
The numbers configured on the ONT are
incomplete.
l
The digitmap configuration is incorrect.
l
The codec and authentication configured on
the ONT are incorrect.
l
A phone number conflict occurs during the
registration.
l
The voice IP address fails to be obtained.
4 Maintenance and Troubleshooting
EchoLife HG8240/HG8245/HG8247 GPON Terminal
Service Manual
4-4
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 04 (2011-01-12)