Table 4-2 Locate A Fault Preliminarily - Huawei HG8240 Service Manual

4 Maintenance and Troubleshooting

Table 4-2 Locate a fault preliminarily

Fault Type
ONT registration failure
Call failure or poor voice quality
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EchoLife HG8240/HG8245/HG8247 GPON Terminal
Possible Cause
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.
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.
Service Manual
Issue 04 (2011-01-12)