Step 11 Check whether the power board is working properly by referring to the status of power supply
indicators on the board. For the status description of the power supply indicators, see A.1
Indicators .
l If the power board is working properly, go to Step 13.
l If the power board is not working properly, go to Step 12.
Step 12 Replace the power board with another one. Then, check whether the fault is rectified.
l If the fault is rectified, go to Step 15.
l If the fault persists, go to Step 13.
Step 13 Check the device hardware and the ambient environment.
1. Ensure that the device is grounded. For details, see 2.1 Checking the Grounding of the
Device. Then, check whether the fault is rectified.
l If the fault is rectified, go to Step 15.
l If the fault persists, go to Step 13.2.
2. Check whether the MA5612 is operating properly.
Check for leaks in the roof of the cabinet, water trails on the chassis, dust in the interior of
the chassis, and evidence of vermin. Also check whether the chassis is properly sealed.
l Wipe away any water and clear away any unwanted debris. Ensure that the equipment
room is waterproof and the chassis is properly sealed. (The chassis keeps insects or
rodents out of the cabinet.) Then, go to Step 13.3.
l If there is no evidence of water or vermin, go to Step 13.4.
3. Take the phone off the hook to check whether the fault is rectified.
l If the fault is rectified, go to Step 15.
l If the fault persists, go to Step 13.4.
4. Check whether there is any source of high-frequency electromagnetic interference exists
around the MA5612 and the subscriber line. If there is such a source, remove it from the
area and check whether the fault is rectified.
l If the fault is rectified, go to Step 15.
l If the fault persists, go to Step 14.
Step 14 Record the results of the preceding steps in a fault report (see Fault Report Form), fill out the
entire form, and then submit it to Huawei for technical support (see Contacting Huawei for
Assistance).
Step 15 End.
----End
5.4 Troubleshooting Fax and Modem Services
This chapter describes how to troubleshoot common fax and modem services based on the H.
248 protocol.
Prerequisites
The ONU and the OLT must communicate with each other normally. If a fault occurs in
communication between the ONU and the OLT, all the services of the ONU are interrupted.
SmartAX MA5612 Multi-service Access Module
Maintenance Guide
5 Troubleshooting Services Transmitted Through a GPON
Port
Issue 01 (2012-07-25) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
192
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