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Several boards of OSN 1500 report "xxxx-OTHER" alarm at the same time

Publication Date:  2012-07-25 Views:  35 Downloads:  0
Issue Description
OSN 1500 SCC version: 5.36.13.47 report alarm“xxxx-OTHER” on several boards at same time.
T2000 version:V2R6C01 SPC001
Alarm Information
"AUX-OTHER"
"PD1-OTHER"
"EOW-OTHER"
"EGS2-OTHER"
"PIU-OTHER"
Handling Process
We check communication between boards in subrack by Navigator command 
:dmm-ping:0,0xff000000,bid,0,0,20,500,2000,500,2 , bid= PDH & SDH board ID of all the slots. The communication between boards was abnormal, ping can not pass. 
Then we decide reset AUX board, but problem still exist. After that we replace AUX board and this alarms disappear.
Root Cause
1.Fault of subrack backplane.
2. AUX is abnormal.
3.Fault in mailbox.
4.Fault of the SCC.
5.Soft problem.
Suggestions
From product manual we can know that intra-board communication for OSN product consists of the following two modes:
1. Two iIntra-board HDLC channels comply with the HDLC protocol.
2. One LAN switch channel.
    Usually if some problems happen with intra-board communication, the root of this problems come from AUX board.

END