NGN Cases Chapter 4 UA5000 Broadband Service
Confidential Information of Huawei. No Spreading without Permission
62
4.2 ADSL Subscribers cannot be authenticated due to high temperature
Title:
ADSL Subscribers cannot be authenticated due to high temperature
ID:
SE0000343846
Update time:
2008-11-25 14:04:19
Author:
00701219Khurram Abbasi
Product
Family:
Integrated Acsess Product: UA5000
Fault Type:
UA5000 Broadband Service
Keywords:
IPMA cannot ping BRAS due to EFS
Digest:
IPMA cannot ping BRAS due to EFS
Phenomenon
Description:
IPMA board can not connect to BRAS. Physical link connectivity is OK and port status is online.
BRAS can not be accessed and all subscriber services are broken
Service connectivity is as follows
UA5000 (IPMA) --> EFS board, FE port (Metro1000 SDH) --> EFS board (Metro3000) --> EGS
2 board, GE port (Metro5000) --> BRAS (GE port)
Alarm
Information:
SDH Alarms,
-----------
FAN Block Alarm at Merto1000 SDH
Board Bad alarm at EFS card.
BMS Alarm,
---------------
IPMA card is offline
IPMA alarm,
----------------
IPMA cannot ping to BRAS.
Cause
Analysis:
Excess dust blockage caused SDH internal cooling fan faulty which was not timely reported and r
esolved which resilts EFS card software hanged due to very high temperature.
Handling
Process:
- Check the BRAS configuration by remote login and no issue found.
- Check the cable connection between UA5000 and Metro1000V3 SDH. Found OK.
- Check the configuration of UA5000. Found OK.
- Check the port status of UA5000. Observed OK.
- Ask Transmission engineer to check the transmission configuration. Transmission engineer repo
rted that all service configuration is ok.
- Physically checked the SDH and felt very high temperature of SDH and its cards panel.
- Ask transmission engineer to check card health. High temperature alarm found at EFS card and
SDH.
- removed the SDH on transmission engineer instructions and removed the EFS card.
- EFS card was extremly hot. We keep it under room temperature for half an hour and let its temp
erature normalized.
- Also removed the fans plate of SDH and cleaned. Reinstall the fan flate and found that 2 out of t
hree fans started working.
- Installed the EFS card when it cooled to normal temperature and ask Transmission engineer to c
heck EFS card. He reported that card is normal.
- Check the IPMA card and ping the BRAS, BRAS is successfully connected.
- Check the subscribers state, subscribers are using ADSL service smoothly.
Suggestions
and summary:
- SDH FAN alarms should not be neglected. It can be service effecting, if ignored. Also, it can da
mage the cards as well.
- Temperature alarms of equipments should also not ignored.
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